Doctors' Questions and Answers

Hello!
Fordyce granules are a benign condition that does not require treatment. If they cause aesthetic discomfort, tretinoin cream may be used. In some patients, the elements become less noticeable, but usually do not disappear completely.
During treatment, redness, dryness and irritation of the skin may occur, so the drug should be used only as prescribed by a doctor and according to the recommended regimen.
If the desired cosmetic effect is not achieved, hardware removal methods remain the most effective.

Hello. Thank you for your inquiry. Yes, prescriptions can be made, as long as there is clinical criteria that validates it.

Good afternoon,

Indeed, ADHD is an area of our specialty and as such, we can prescribe drugs while in Spain. Usually an initial approach is carried out to assess whether there is presence of ADHD; if the patient already has the diagnosis, it is necessary to include the corresponding report in the consultation for verification before starting treatments.

Good day, yes, we have the opportunity to prescribe treatment to correct the symptoms of ADHD, but after consultation, diagnosis, observation of the treatment process with other drugs) We may have many options on the platform) We will be very happy for you)

Look, everything is simpler than it seems. Ozempic and Vegovi are the same substance, semaglutide. Difference in purpose: Ozempic is prescribed for type 2 diabetes, so that sugar does not jump. Many people lose weight on it, but formally that’s not what it’s for. And Vegovi is the same semaglutide, only officially for weight loss, and the dose is higher, 2.4 mg per week.
Munjaro is a different molecule, tirzepatide. The fundamental difference is that it works through two mechanisms simultaneously, and not through one, like semaglutide. It is used for diabetes and for weight loss. According to a large comparative study, tirzepatide produced approximately 20% weight loss versus 14% for semaglutide over a year and a half. It is clear that the numbers are average and everyone has their own result, but the trend is in favor of Munjaro.
The side effects of all three are similar - nausea, digestive problems, loss of appetite. From a serious point of view: gallstones, pancreatitis, kidneys can be damaged if you don’t drink enough water. It is not possible if you have medullary thyroid cancer or MEN-2 syndrome (multiple endocrine neoplasia type 2) in the family.
Essentially: if the task is sugar, they usually go to Ozempic or Munjaro. If the goal is weight, consider Vegovi or Munjaro. So far Munjaro has shown the maximum effect on weight. But in any case, these are not vitamins - the doctor must select them taking into account the whole picture: tests, concomitant diseases, other medications and what else is available.

Hello

Ozempic, Wegovy and Mounjaro are all injectable medications used for weight management and/or diabetes, but they are not exactly the same.

• Ozempic contains semaglutide and is officially approved mainly for type 2 diabetes, although many people also lose weight with it.

• Wegovy also contains semaglutide, but at a higher target dose specifically approved for obesity and weight loss treatment.

So, Ozempic and Wegovy are essentially the same active medication, but with different dosing and official indications.

• Mounjaro contains tirzepatide, which works differently because it activates two hormonal pathways (GIP and GLP-1) instead of only GLP-1. In clinical studies, this tends to produce greater average weight loss and stronger metabolic effects in many patients.

In practical terms:

• Ozempic → diabetes first, moderate-to-strong weight loss
• Wegovy → weight loss focused semaglutide
• Mounjaro → newer dual-action option, often associated with greater weight reduction

However, the “best” option depends on the individual patient:

• BMI and weight-loss goals
• diabetes or insulin resistance
• side effects tolerance
• thyroid/pancreatic history
• cardiovascular risk
• medication availability and cost

All of them require medical supervision and work best when combined with nutrition, exercise and long-term lifestyle changes. They are powerful tools, but not magic injections — the real value comes from sustained metabolic improvement and habit change.

La diferencia real está en su principio activo y para qué se recetan. Ozempic y Wegovy contienen semaglutida, pero Ozempic se usa principalmente para diabetes tipo 2 y riesgo cardiovascular, mientras que Wegovy tiene una dosis más alta y está aprobado específicamente para pérdida de peso. Mounjaro contiene tirzepatida, que actúa sobre dos receptores (GLP-1 y GIP), y se ha asociado con una mayor pérdida de peso en comparación con la semaglutida. La elección depende de tu objetivo principal y debe ser evaluada por tu médico.

The real difference is in their active ingredient and approved use. Ozempic and Wegovy both contain semaglutide, but Ozempic is mainly for type 2 diabetes and cardiovascular risk, while Wegovy has a higher dose and is specifically approved for weight loss. Mounjaro contains tirzepatide, which targets two receptors (GLP-1 and GIP), and tends to produce more weight loss than semaglutide. Which one is right for you depends on your main goal and should be discussed with your doctor.

Ozempic and Wegovy contain the same molecule, semaglutide. The difference is not in the active ingredient, but in the therapeutic indication and dosages: Ozempic was developed mainly for the treatment of type 2 diabetes, while Wegovy is the formulation approved for the treatment of obesity, with higher doses. For this reason, from the name of the drug it is often possible to understand whether the main goal of therapy is diabetes control or weight reduction. Even though they contain the same molecule, the two drugs are not automatically interchangeable, as they have different authorized indications and therapeutic schemes.

Mounjaro, however, contains tirzepatide, a different molecule. It acts on two receptors involved in the regulation of blood sugar and appetite (GIP and GLP-1). In addition to reducing appetite, it helps many people achieve a sense of satiety more easily after meals, better control hunger throughout the day and further improve blood sugar levels. For this reason, it can lead to greater weight reduction in many patients than semaglutide.

However, this doesn't mean Mounjaro is always the best choice. In patients with type 2 diabetes, semaglutide has solid evidence on cardiovascular benefits and renal protection, gained over many years of clinical studies. Also for tirzepatide the available results are very promising and the evidence continues to strengthen, but the clinical experience is more recent.

In people without diabetes, the choice between semaglutide and tirzepatide is not based solely on effectiveness in weight loss. The doctor evaluates the clinical picture as a whole, considering the degree of obesity, any associated diseases, the tolerability of the treatment, the possible contraindications, the risk of side effects and the long-term therapeutic objectives. In some patients semaglutide is an excellent choice, while in others tirzepatide may offer greater benefit

Side effects are similar for both therapies (nausea, vomiting, diarrhea or constipation) and often depend more on the speed with which the dose is increased than on the drug itself. Furthermore, after suspension it is possible to regain part of the weight lost with both treatments: for this reason it is essential to accompany the therapy with a balanced diet, an adequate intake of proteins and physical activity, so as to encourage weight maintenance and preserve muscle mass.

A frequent mistake is to choose the drug exclusively based on the kilos it allows you to lose. In reality, the ideal treatment is one that allows you to obtain a stable result over time, with good tolerability and without having to be suspended due to unwanted effects. More gradual, but long-lasting, weight loss is often preferable to very rapid weight loss followed by weight regain.

Ultimately, the question should not be "which drug is the strongest?", but "which drug is best suited to my clinical situation?". There is no best drug for everyone: the choice depends on the presence of diabetes, cardiovascular or renal disease, the amount of weight to lose, tolerability, contraindications and the objectives of the therapy. In any case, none of these drugs replace a healthy lifestyle: nutrition, physical activity and medical follow-up remain an integral part of the treatment and are essential to obtain lasting benefits. Greetings, Dr. Lina Travkina

Ozempic and Wegovy are the same drug (semaglutide). The only difference is in the dosage and purpose of use: Ozempic - low doses (up to 2 mg), officially prescribed for type 2 diabetes. Wegovy - high doses (2.4 mg), officially prescribed for weight loss. Mounjaro is a different drug (tirzepatide). Its key difference is that it acts on two hormones at once (GIP and GLP-1), and not on one, like semaglutide. Because of this, it often provides greater benefits for weight loss and sugar control.

Good afternoon. Yes, I could take care of issuing the prescription after checking the name of the medication. All the best

Se debe valorar que antibiotico precisa para su infeccion de orina. Además, siempre recomendamos probiotiocos posterior al tratamiento, asi como tratamientos preventivos como por ejemplo cistitus de farmacia.

Good morning. If the prescription was issued by one of the doctors on our platform, you can contact support: the case will be verified and, if necessary, the prescription can be modified.
However, if the prescription was issued by another doctor, you can use the "Prescription Renewal" service, attaching the prescription you already have and explaining that the drug is not available in Spain. Your doctor will evaluate an appropriate alternative.

Hello, please contact our customer support, they will be happy to support you.

Hello! Yes, of course — if you book a consultation, myself or one of our licensed physicians can assess your situation and, where clinically appropriate, provide a replacement prescription for your pregabalin while you are in Portugal.

If possible, please have any proof of your regular medication available (such as a photo of the prescription, medication box, NHS app, or pharmacy record), as this can help speed things up.

Hope you enjoy your stay in Portugal and get sorted quickly!

You can request a new prescription without problem and renew treatment to continue with it during your stay in Portugal. It is a drug subject to medical prescription.

Good afternoon
Yes, of course, you can get a prescription. It is recommended to consult a general practitioner or neurologist with the results of previously performed studies on back pain to confirm the diagnosis and prescribe therapy.

precisa prescripcion y seguimiento medico. Desde Oladoctor proporcionamos un trato profesional. no dude en contactar con nuestro equipo medico

Good morning. In a situation like this it is important to try not to suddenly stop therapy. For some drugs it may be sufficient to request a "prescription renewal", while for others, such as pregabalin, a brief medical consultation is generally preferable, especially if taken in high doses. I therefore advise you to book an online consultation and, if possible, to attach a copy of the previous prescription, a letter from the treating doctor or a photo of the medicine packaging. This will help the doctor confirm the therapy and evaluate the issuing of the most appropriate prescription. Kind regards

Hello! I really understand your situation - being in a new country without an assigned family doctor and at the same time getting sick is really unpleasant and worrying. Let me try to help you figure it out.

A sore throat combined with a fever is one of the most common reasons for visiting a therapist. In most cases, we are talking about ARVI, pharyngitis or tonsillitis, which are perfectly treatable and do not require emergency help. The emergency department (urgência) in Portugal is a resource for truly critical situations: a high temperature above 39–40°C that does not break down, severe shortness of breath, chest pain, severe weakness or confusion. If you have a moderate temperature and your general condition is tolerable, an ambulance in this case is redundant, and you risk spending several hours in line.

An online consultation with a doctor is exactly what you need right now. An experienced therapist will assess your symptoms remotely, prescribe treatment if necessary, recommend over-the-counter medications that can be bought in a Portuguese pharmacy, and tell you whether you still need to see them in person. It's convenient, fast and allows you to get professional help without leaving home, which is especially important when you're not feeling well.

Do not delay in seeing a doctor - even mild ARVI is better treated in a timely manner to avoid complications. I wish you a speedy recovery and a speedy settlement in Portugal!

A sore throat and fever can often be assessed by an online doctor, especially if symptoms started recently and you are otherwise well. However, if you have difficulty breathing, severe difficulty swallowing, dehydration, chest pain, confusion, or are feeling seriously unwell, you should seek urgent in-person medical care. An online consultation can help determine whether you need testing, medication, or referral for further evaluation.

Hola! siempre se debe valorar un dolor de garganta y desde Oladoctor podemos asesorarte sin problemas. feliz tarde

Good morning. In many cases, sore throat and fever can initially be assessed with an online consultation. On our platform you can consult any available doctor, even if they are in another country. If necessary, the doctor will be able to prescribe a therapy and issue a prescription also valid in Portugal. Online consultation allows you to start treatment as soon as possible and understand whether further investigations or an in-person visit are necessary. However, if breathing difficulties, significant difficulty swallowing or other serious symptoms appear, it is advisable to contact an emergency service promptly. I wish her a speedy recovery!

Mixing sildenafil (Viagra) with alcohol is unsafe. Both substances lower blood pressure, and their combined action can lead to serious unwanted effects.

Main risks:

1. Severe hypotension. Sildenafil is a PDE-5 inhibitor, it dilates blood vessels and lowers blood pressure. Alcohol has a similar effect. When used together, a sharp drop in pressure, dizziness, fainting, and in severe cases - collapse are possible.

2. Increased side effects of Viagra. Headache, hot flashes, tachycardia and visual disturbances (including “blue tint”) may be exacerbated by alcohol.

3. Reduced effectiveness of the drug. Alcohol disrupts the normal mechanism of erection - it depresses nerve conduction and reduces testosterone levels, which can negate the effect of sildenafil.

4. Increased load on the heart. In patients with cardiovascular disease or hypertension, the combination of Viagra and alcohol significantly increases the risk of cardiac complications.

What is acceptable according to clinical studies:
A small amount of alcohol (up to 1 standard dose - approximately 150 ml of wine or 350 ml of beer) does not significantly affect the pharmacokinetics of sildenafil. However, even moderate use in combination with the drug is individual and requires caution.

Recommendation: refrain from alcohol while taking Viagra, especially if you have cardiovascular disease, hypertension, or are taking nitrates (the combined use of sildenafil and nitrates is absolutely contraindicated and life-threatening).

Yes—a small amount of alcohol is usually okay with Viagra, but drinking a lot can make you dizzy or faint and can also make the Viagra work worse, so it’s best to keep it to 1–2 drinks and avoid binge drinking.
Don’t use Viagra if you take nitrates (e.g., GTN spray/patch) because that combination can cause dangerous low blood pressure
If you get chest pain, severe dizziness, or fainting after mixing them, seek urgent care.

Both alcohol and sildenafil, that is, Viagra, can dilate blood vessels and lower blood pressure, so when mixing them some people experience dizziness, headache, feeling faint or palpitations. It's not usual.

Additionally, alcohol in high amounts can make erection more difficult on its own. This means that, logically, even if you have taken Viagra, a significant intake of alcohol can reduce sexual response and make the medication seem less effective.

It would not be contraindicated but it is advisable to avoid excessive consumption and take special caution if there is a history of hypotension, cardiovascular diseases or if other medications that affect blood pressure are taken.

If you have any intense or persistent symptoms, you can consult with our professionals for further development of your questions and/or necessary prescriptions.

Español
No es recomendable. Mezclar Viagra (sildenafil) con alcohol aumenta el riesgo de efectos secundarios como bajada de presión arterial, mareos, dolor de cabeza y taquicardia, ya que ambos dilatan los vasos sanguíneos. El alcohol además puede reducir la eficacia del medicamento y afectar tu capacidad para lograr o mantener una erección. Si bebes, hazlo con mucha moderación (una copa como máximo) y separado de la toma, pero lo más seguro es evitar el alcohol mientras estés bajo tratamiento. Siempre consulta con tu médico antes de combinar cualquier fármaco con alcohol.

English
It is not advisable. Mixing Viagra (sildenafil) with alcohol increases the risk of side effects like low blood pressure, dizziness, headaches, and rapid heartbeat, since both dilate blood vessels. Alcohol can also reduce the drug's effectiveness and affect your ability to get or maintain an erection. If you do drink, do so very moderately (at most one drink) and separate from the dose, but the safest option is to avoid alcohol altogether while on this medication. Always check with your doctor before combining any drug with alcohol.

When combining Viagra (sildenafil) and alcohol, both safety and effectiveness must be considered. A glass of wine or a beer, in most cases, is not a problem. The real limit is excess alcohol: in addition to increasing the risk of side effects (such as dizziness, drop in blood pressure and headaches), it can compromise erections and give the impression that sildenafil is not working. If you want to get the maximum benefit from the drug, it is advisable to limit alcohol consumption and avoid excesses.

Cystitis after intercourse is common, especially in women, and is called “postcoital cystitis” or “honeymoon cystitis.” Here are the main reasons for its occurrence:

1. Anatomical features. In women, the urethra is short (about 4 cm) and located close to the vagina and anus. During sexual intercourse, bacteria, including E. coli, can easily enter the urethra and bladder.

2. Mechanical irritation. Friction during sex can cause microdamage to the lining of the urethra, making it easier for bacteria to enter and multiply.

3. Changes in microflora. Sexual intercourse temporarily disrupts the balance of the normal microflora of the vagina and urethral zone.

4. Urinary retention. If you don't urinate immediately after sex, bacteria remain in the urethra and have the opportunity to multiply.

What to do for prevention:

• Urinate immediately after intercourse (within 15-20 minutes) - this flushes bacteria from the urethra.
  — Maintain intimate hygiene before and after sex.
  — Drink enough water throughout the day (1.5–2 liters).
  — For recurrent postcoital cystitis, the doctor may prescribe a single prophylactic dose of an antibiotic after sexual intercourse.

If episodes recur more than 2-3 times a year, it is important to contact a urologist or gynecologist for a full examination (urine culture, ultrasound of the bladder) and selection of an individual prevention regimen. Self-medication with antibiotics without consulting a doctor is unacceptable - this leads to the development of bacterial resistance!

Cystitis after sex usually happens because intercourse can move bacteria (often E. coli) from the skin/vaginal area into the urethra and up to the bladder, where they cause an infection. It’s more likely if you’re prone to UTIs, use spermicides, have low estrogen after menopause, or don’t fully empty your bladder. If it’s recurring, it’s worth getting a urine culture during symptoms and asking about prevention; seek urgent care if you get fever, chills, or back/flank pain.

Español
Es muy frecuente y tiene una explicación clara: durante el coito, especialmente con penetración vaginal, se produce un "masaje" de la uretra y la vejiga, y las bacterias de la zona perianal o vaginal (generalmente E. coli) pueden ascender hacia la vejiga. Además, el roce y la fricción pueden irritar la uretra, facilitando la infección. Por eso se llama "cistitis de luna de miel". Para prevenirlo, es clave orinar inmediatamente después del sexo para "lavar" las bacterias, beber suficiente agua, mantener una buena higiene (sin excesos), y a veces el médico puede recomendar un antibiótico profiláctico o dosis única postcoital si es muy recurrente.

English
This is very common and has a clear explanation: during intercourse, especially with vaginal penetration, the urethra and bladder get "massaged," and bacteria from the perianal or vaginal area (usually E. coli) can travel up into the bladder. Also, friction can irritate the urethra, making infection easier—that's why it's sometimes called "honeymoon cystitis." To prevent it, the key is to urinate right after sex to "flush out" bacteria, drink plenty of water, maintain good hygiene (without overdoing it), and if it's very recurrent, your doctor may consider a prophylactic antibiotic or a single postcoital dose.

Cystitis after intercourse is often caused by the ascent of bacteria, especially Escherichia coli, towards the bladder. In some women the symptoms may appear only occasionally, while in others almost after every intercourse. Sexual intercourse can in fact favor the migration of bacteria already present in the perineal area or in the urethra and, through mechanical friction, facilitate their proliferation and the onset of infection. If the episodes are sporadic, urinating after intercourse and drinking abundantly is usually sufficient. However, if cystitis occurs almost every time, it is important to contact your doctor to evaluate a personalized preventive strategy, which may also include specific supplements or, in selected cases, a targeted prophylaxis.

You should be seen by a doctor and advised.

Erectile dysfunction (ED) at 30 is not uncommon, and yes, it is a reason to see a doctor, but not a reason to panic. According to research, about 25-30% of men under the age of 40 experience periodic erection difficulties.

The reasons can be very different:

1. Psychogenic factors are the most common cause in young men. Stress, anxiety, depression, fatigue, relationship problems or so-called "performance anxiety" can directly impair erections. The nervous system plays a key role in this process.

2. Vascular and metabolic disorders. Even at 30 years old, early signs of atherosclerosis, hypertension or insulin resistance are possible. ED is often the first symptom of cardiovascular disease.

3. Hormonal imbalance. Low testosterone levels, high prolactin, or thyroid dysfunction can cause ED at any age.

4. Lifestyle. Smoking, alcohol, excess weight, physical inactivity, anabolic steroids and some medications (antidepressants, beta blockers) are proven risk factors.

What to do:
— Contact a urologist or andrologist. The doctor will prescribe a basic examination: testosterone levels, prolactin, TSH, glucose, lipid profile, blood pressure.
— Assess your lifestyle: sleep, physical activity, nutrition, stress level.

• Do not self-medicate and do not take drugs from the PDE-5 inhibitor group without consultation - it is important to identify the cause and not mask the symptom.

Conclusion: ED at age 30 is often reversible with timely evaluation and treatment. Early contact with a specialist significantly increases the chances of a full recovery.

Español
A los 30 años, los problemas de erección ocasionales son normales y suelen deberse a estrés, ansiedad, cansancio o consumo de alcohol. Pero si es recurrente (más del 75% de las veces durante meses), sí merece atención. A esta edad, las causas orgánicas son menos frecuentes, pero no imposibles: pueden estar relacionadas con niveles bajos de testosterona, diabetes, hipertensión, colesterol alto, problemas de tiroides o incluso fármacos (antidepresivos, etc.). También factores como el sedentarismo, el sobrepeso o el tabaquismo influyen mucho. No te alarmes, pero tampoco lo minimices: consulta con un urólogo o andrólogo para una evaluación completa (analítica, perfil hormonal y vascular). Muchas veces tiene solución con cambios de hábitos, terapia psicológica o tratamiento médico.

English
At 30, occasional erection problems are normal and often due to stress, anxiety, fatigue, or alcohol use. But if it happens recurrently (more than 75% of the time for months), it does deserve attention. At this age, organic causes are less common but not impossible: they can be linked to low testosterone, diabetes, high blood pressure, high cholesterol, thyroid issues, or even medications (antidepressants, etc.). Lifestyle factors like inactivity, being overweight, or smoking also play a big role. Don't panic, but don't brush it off either—see a urologist or andrologist for a full workup (bloodwork, hormonal and vascular assessment). In many cases, it's reversible with lifestyle changes, psychological support, or medical treatment.

At age 30, erectile dysfunction is often reversible and, in most cases, is not associated with a serious disease. For this reason there is no need to be alarmed, but nor to ignore the problem. In young people, in fact, erectile dysfunction is frequently linked to modifiable factors, such as stress, performance anxiety, insufficient sleep, sedentary lifestyle, unbalanced diet, smoking or excessive alcohol consumption. The first step is therefore to correct these aspects of lifestyle.

If the problem is occasional and there are no other symptoms or risk factors present, temporarily using a PDE-5 inhibitor (such as sildenafil or tadalafil) may be appropriate after a medical evaluation. In many patients these drugs allow them to regain confidence in their sexual abilities, interrupting the vicious cycle of performance anxiety. When the response is good and safety increases, in clinical practice it is often possible to progressively reduce its use until it is suspended.

However, if the disorder persists for more than 3 months despite the correction of the main modifiable lifestyle factors (such as sleep, nutrition, physical activity, reduction of smoking and alcohol and stress management), occurs in most relationships or is present from the beginning of sexual activity, it is appropriate to investigate further with a clinical evaluation and some targeted tests (blood sugar or HbA1c, lipid profile, TSH, total morning testosterone and possibly prolactin), in addition to measuring blood pressure. The objective is not only to treat the symptom, but to identify and correct any modifiable causes, recognize possible cardiovascular risk factors early and set the most appropriate treatment.

Unpleasant sensations similar to cystitis may well return again and again - even when the examination results look absolutely normal. But it is important to understand: recurring symptoms and real bacterial cystitis with relapses are not the same thing.

Current clinical guidelines clearly state that to make a diagnosis of recurrent urinary tract infection, a bacteriological culture is needed. Usually we are talking about two or more confirmed episodes in six months or three or more in twelve months - and each time it is desirable to record the growth of the pathogen precisely against the background of complaints. The 2025 European urological guidelines insist that the diagnosis is made based on culture results, while American guidelines emphasize that it is unacceptable to prescribe antibiotics “by eye,” without laboratory confirmation.

What could be behind typical complaints during “clean” tests? There are many options. Sometimes it’s a matter of banal mistakes - an incorrectly collected portion of urine, an analysis against the background of an antibiotic that has already been started, or a bacteria count that is too low for the standard method. But often the reason is completely different: genital infections, urethritis, vaginal inflammation, atrophic changes in the mucosa due to estrogen deficiency, detrusor overactivity, interstitial cystitis or chronic pelvic myofascial pain. There is evidence that in some women with a characteristic clinical picture and a negative routine culture, more subtle laboratory methods still detect an infection - however, this does not eliminate the need to understand the true cause.

What to do in practice? Take a urine culture strictly before starting antibiotics and precisely when there are complaints. Be sure to discuss screening for sexually transmitted infections with your doctor, undergo a gynecological examination, and find out whether there is a connection with sexual activity, hormonal changes, or method of contraception. Taking course after course of antibiotics without a proven infection is a bad idea. If relapses are nevertheless confirmed, the guidelines offer a whole range of preventive measures: correction of behavioral habits, local estrogens for postmenopausal changes, methenamine hippurate, and in some cases long-term antibiotic prophylaxis. As for cranberries and D-mannose, the evidence base for them still remains scarce and ambiguous.

When you need to see a doctor without delay: fever, pain in the lumbar region or side, blood in the urine, pregnancy, male gender, conditions with a weakened immune system, intense pain, and persistence of symptoms for more than two to three days.

Hello!

Yes, it can happen. Some people have symptoms consistent with recurrent cystitis even if urine tests or cultures come back normal, especially if the sample is taken outside of the acute episode or after taking antibiotics.

There are also other causes that can produce similar symptoms, such as:

non-bacterial bladder inflammation,
painful bladder syndrome/interstitial cystitis,
vaginal or urethral irritation,
hormonal alterations,
sexual relations,
urinary stones,
or bacteria that are not always easily detected in standard cultures.

If episodes are frequent, we usually recommend:

urine culture during symptoms before starting antibiotics,
gynecological/urological examination,
urinary ultrasound if recurrent,
and assess predisposing factors (hydration, sexual relations, constipation, diabetes, etc.).

You should seek more urgent medical evaluation if you experience fever, lower back pain, blood in urine, vomiting, or significant worsening.

Español
Sí, es más frecuente de lo que parece. Que los análisis (urocultivo) salgan "bien" no descarta que tengas cistitis, porque puede deberse a bacterias que no crecen en el cultivo estándar, a una irritación crónica de la vejiga (cistitis intersticial), a desequilibrios en la flora vaginal, o a factores como el estrés, la alimentación o hábitos de higiene. También puede haber infecciones de repetición con bacterias diferentes que se eliminan entre episodio y episodio, y por eso el cultivo de control da negativo. Lo importante es que no lo normalices: si se repite, conviene hacer un estudio más completo con un urólogo o ginecólogo, que puede incluir ecografía, cistoscopia o estudios de micción, y valorar pautas de prevención como probióticos, cambios de hábitos o incluso antibióticos a demanda.

English
Yes, it's more common than you might think. A negative urine culture doesn't rule out recurrent cystitis, because it could be due to bacteria that don't grow in standard cultures, chronic bladder irritation (interstitial cystitis), vaginal flora imbalances, or lifestyle factors like stress, diet, or hygiene habits. It can also be repeated infections with different bacteria that clear up between episodes, leaving a negative control culture. The key is not to ignore it: if it keeps happening, you should see a urologist or gynecologist for a fuller workup—possibly including ultrasound, cystoscopy, or voiding studies—and consider preventive strategies like probiotics, lifestyle changes, or even on-demand antibiotics.