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Sexually transmitted infections (STIs)

Sexually transmitted infections (STIs) are infections passed through sexual contact. Many cause mild or no symptoms but can lead to serious health problems if left untreated.

If these symptoms are severe, persistent or worsening, seek medical advice promptly.

Prescription review online

Prescription review online

A doctor will review your case and issue a prescription if medically appropriate.

Talk to a doctor online

Talk to a doctor online

Discuss your symptoms and possible next steps with a doctor online.

This page provides general information and does not replace a doctor’s consultation. If symptoms are severe, persistent or worsening, seek medical advice promptly.

Sexually transmitted infections (STIs) are common and can be passed on during sex or through sexual contact. They can usually be treated at a sexual health clinic.

Symptoms of a sexually transmitted infection (STI)

Symptoms of a sexually transmitted infection (STI) can include:

  • an unusual discharge from your vagina, penis or anus
  • pain when peeing
  • lumps or skin growths around your genitals or bottom (anus)
  • a rash
  • unusual vaginal bleeding
  • itchy genitals or anus
  • blisters, sores or warts around your genitals or anus
  • warts in your mouth or throat, but this is very rare

How soon symptoms appear depends on the type of STI you have.

Many STIs have no symptoms. This means you can have an STI without knowing it and infect your partner during sex.

The only way to know for sure is to get tested.

STIs can take up to 7 weeks after you have unprotected sex to show up on a test. If you do not have symptoms, it’s best to wait 7 weeks before getting tested.

 Go to a sexual health clinic if: 

  • you think you may have an STI
  • a sexual partner has symptoms of an STI
  • you're worried after having sex without a condom
  • you're pregnant with symptoms of an STI
  • you're having casual sex without a condom with new partners – you may be at risk of HIV and other STIs

Do not have sex, including oral sex, without using a condom until you've had a check-up or been tested.

Why you should go to a sexual health clinic

You can see a GP, but they'll probably refer you to a sexual health clinic if they think you have an STI.

You do not usually need a GP referral or an appointment for a sexual health clinic, but contact the clinic first to check.

Doctors and healthcare professionals are there to help you, so try not to feel uncomfortable about sharing information about your sexual activities or sexuality.

You do not need to give your real name or tell staff the name of your GP surgery if you do not want to. No information about your visit to the clinic will be shared with the GP or anyone else outside the clinic unless you ask for it to be.

You can ask to see a female or male doctor or nurse if you wish.

What happens at a sexual health clinic

If you think you have a sexually transmitted infection (STI), the doctor or nurse at the sexual health clinic:

  • will ask you about your sex life
  • may ask to look at your genitals or anus
  • will tell you what tests they think you need

These tests can include:

  • testing a sample of your pee
  • blood tests
  • testing a sample of cells taken from the urethra (the tube that pee comes out of), using a small cotton bud (swab)
  • testing a sample of cells from inside your vagina or anus using a small cotton bud (swab)

Some clinics offer home testing kits for some STIs.

If tests show you have an STI, you should tell your current sexual partner, or partners, and any ex-partners so they can get tested and treated as well.

If you do not want to do this, the clinic can usually do it for you without naming you.

Treatment for sexually transmitted infections (STIs)

Most sexually transmitted infections (STIs) need treatment. The treatment you have will depend on which STI you have.

Many STIs are treated with antibiotics.

Always finish the course of treatment prescribed for you or it may not work properly.

Do not have sex (including oral sex) until you and your partner or partners have finished treatment.

 Important 

If you need treatment, it’s important to tell your current and previous sexual partner (or partners). Sexual health clinics may be able to help you contact them anonymously.

Common types of sexually transmitted infection (STI)

There are different types of sexually transmitted infection (STI), including:

Consult with a doctor about Sexually transmitted infections (STIs)

Consult with a doctor about Sexually transmitted infections (STIs)

Discuss your symptoms and possible next steps with a doctor online.

Online doctors for Sexually transmitted infections (STIs)

Discuss your symptoms and possible next steps for Sexually transmitted infections (STIs) with a doctor online.

5.0 (69)
Doctor

Tarek Agami

General medicine 11 years exp.

Dr. Tarek Agami is a general practitioner registered in both Portugal and Israel, with broad experience in family and preventive medicine. He offers online consultations for adults and children, providing personalised support for primary care needs, chronic disease management, and everyday health concerns.

Dr. Agami received clinical training and worked in leading medical institutions in Israel (Kaplan Medical Center, Barzilai Medical Center, Wolfson Medical Center) and Portugal (European Healthcare City, Viscura Internacional, Hospital Dr. José Maria Grande, Hospital Vila Franca de Xira). His approach combines international medical standards with individualised attention to each patient.

Main areas of consultation:

  • Diagnosis and treatment of acute and chronic conditions (high blood pressure, diabetes, respiratory infections, cardiovascular symptoms)
  • Evaluation of symptoms and guidance on further diagnostic testing
  • Preventive check-ups and regular health monitoring
  • Medical support during travel or after relocation
  • Treatment adjustments and lifestyle recommendations based on your personal history
Dr. Agami provides medical support for patients using GLP-1 medications (such as Ozempic or Mounjaro) as part of a weight loss strategy. He offers individualised treatment planning, regular follow-up, dose adjustment, and advice on combining medication with sustainable lifestyle changes. Consultations follow the medical standards accepted in Portugal and Israel.

Dr. Agami is committed to evidence-based, patient-centred care, ensuring that each person receives trusted medical support tailored to their health goals.

5.0 (63)
Doctor

Nuno Tavares Lopes

Family medicine 18 years exp.

Dr. Nuno Tavares Lopes is a licensed physician in Portugal with 17 years of experience in emergency medicine, family and general practice, and public health. He is the Director of Medical and Public Health Services at an international healthcare network and serves as an external consultant for the WHO and ECDC.

  • Emergency care: infections, fever, chest/abdominal pain, minor injuries, paediatric emergencies
  • Family medicine: hypertension, diabetes, cholesterol, chronic disease management
  • Travel medicine: pre-travel advice, vaccinations, fit-to-fly certificates, travel-related illnesses
  • Sexual and reproductive health: PrEP, STD prevention, counselling, treatment
  • Weight management and wellness: personalised weight loss programmes, lifestyle guidance
  • Skin and ENT issues: acne, eczema, allergies, rashes, sore throat, sinusitis
  • Pain management: acute and chronic pain, post-surgical care
  • Public health: prevention, health screenings, long-term monitoring
  • Sick leave (Baixa médica) connected to Segurança Social in Portugal
  • IMT medical certificates for driving licence exchange
Dr. Nuno Tavares Lopes provides medical support for patients using GLP-1 medications (Mounjaro, Wegovy, Ozempic, Rybelsus) as part of a weight loss strategy. He offers individualised treatment planning, regular follow-up, dose adjustment, and advice on combining medication with sustainable lifestyle changes. Consultations follow the medical standards accepted in Europe.

Dr. Lopes also provides interpretation of medical tests, follow-up care for complex patients, and multilingual support. Whether for urgent concerns or long-term care, he helps patients act with clarity and confidence.

5.0 (17)
Doctor

Anastasiia Shalko

Family medicine 13 years exp.

Dr. Anastasiia Shalko is a general practitioner with a background in both paediatrics and general medicine. She graduated from Bogomolets National Medical University in Kyiv and completed her paediatric internship at the P.L. Shupyk National Medical Academy of Postgraduate Education. After working as a paediatrician in Kyiv, she relocated to Spain, where she has been practising general medicine since 2015, providing care for both adults and children.

Her work focuses on urgent, short-term medical concerns – situations where patients need quick guidance, symptom assessment and clear next steps. She helps people understand whether their symptoms require in-person evaluation, home management or a change in treatment. Common reasons for booking an online consultation include:

  • acute respiratory symptoms (cough, sore throat, runny nose, fever)
  • viral illnesses such as colds and seasonal infections
  • gastrointestinal complaints (nausea, diarrhoea, abdominal pain, gastroenteritis)
  • sudden changes in how a child or adult feels
  • questions about existing treatment and whether adjustments are needed
  • renewal of prescriptions when clinically appropriate
Dr. Shalko works specifically with urgent and short-term problems, providing practical recommendations and helping patients determine the safest next step. She explains symptoms clearly, guides patients through decision-making and offers straightforward medical advice for everyday acute issues.

She does not provide long-term management of chronic conditions, ongoing follow-up or comprehensive care plans for complex long-term illnesses. Her consultations are designed for acute symptoms, sudden concerns and situations where timely medical input is important.

With clinical experience in both paediatrics and general medicine, Dr. Shalko confidently supports adults and children. Her communication style is clear, simple and reassuring, helping patients feel informed and supported throughout the consultation.

5.0 (3)
Doctor

Tomasz Grzelewski

Dermatology 21 years exp.

Dr Tomasz Grzelewski is an MD, PhD specialist in allergy, paediatrics, general practice and sports medicine, with a clinical focus on dermatology, endocrinology, allergology and sports-related health. He has more than 20 years of clinical experience and completed his medical training at the Medical University of Łódź, where he defended his PhD thesis with distinction. His doctoral research was recognised by the Polish Society of Allergology for its innovative contribution to the field. Throughout his career, he has gained extensive expertise in diagnosing and managing a wide range of allergic and paediatric conditions, including modern allergen desensitisation techniques.

For five years, Dr Grzelewski served as the Head of two paediatric departments in Poland, managing complex clinical cases and leading multidisciplinary teams. He also worked in medical centres in the United Kingdom, gaining experience across both primary care and specialist environments. With over a decade of telemedicine experience, he has provided online consultations across Europe and is valued for his clear, structured and evidence-based medical guidance.

Dr Grzelewski is actively involved in clinical programmes focused on modern anti-allergic therapies. As a Principal Investigator, he leads research projects on sublingual and oral allergen desensitisation, supporting evidence-based progress in allergy treatment for both children and adults.

In addition to his background in allergology and paediatrics, he completed dermatology studies through the Cambridge Education Group (Royal College of Physicians of Ireland) and a Clinical Endocrinology course at Harvard Medical School. This advanced training enhances his ability to manage skin manifestations of allergies, atopic conditions, urticaria, endocrine-related symptoms and complex immunological reactions.

Patients commonly seek his care for:

  • seasonal and perennial allergies
  • allergic rhinitis and chronic nasal symptoms
  • asthma and breathing difficulties
  • food and medication allergies
  • urticaria, atopic dermatitis and skin reactions
  • recurrent infections in children
  • sports-related health questions
  • general family medicine concerns
Dr Tomasz Grzelewski is known for his clear communication style, structured medical approach and ability to explain treatment options in a concise and accessible way. His multidisciplinary background across allergy, paediatrics, dermatology and endocrinology allows him to provide safe, up-to-date and comprehensive care for patients of all ages.
0.0 (0)
Doctor

Daniel Cichi

Family medicine 24 years exp.

Dr Daniel Cichi is a family medicine doctor with over 20 years of clinical experience. He provides online consultations for adults, supporting patients with acute symptoms, chronic conditions, and everyday health concerns that require timely medical guidance.

His background includes work in emergency care, ambulance services, and family medicine, which allows him to assess symptoms quickly, identify warning signs, and help patients choose the safest next steps – whether that means home care, treatment adjustment, or in-person evaluation.

Patients commonly consult Dr Daniel Cichi for:

  • acute symptoms: fever, infections, flu-like illness, cough, sore throat, shortness of breath;
  • chest discomfort, palpitations, dizziness, fatigue, and blood pressure concerns;
  • digestive problems: abdominal pain, nausea, diarrhoea, constipation, reflux;
  • muscle, joint, and back pain, minor injuries, post-traumatic symptoms;
  • chronic conditions: hypertension, diabetes, high cholesterol, thyroid disorders;
  • review and interpretation of lab tests, imaging reports, and medical documents;
  • medication review and treatment adjustment;
  • medical advice while travelling or living abroad;
  • second opinions and guidance on whether in-person care is needed.
Dr Cichi’s consultations are structured and practical. He focuses on clear explanations, risk assessment, and actionable recommendations, helping patients understand their symptoms and make informed decisions about their health.
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