Is it normal to have recurrent cystitis even with normal tests?

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.