STI Symptoms, Testing & Online Doctor Help in the UK
Educational information — not medical advice.
This article was prepared by the OnlineDoctor24 editorial team and reviewed for factual accuracy against UK clinical guidance (NHS and NICE). It is not written by a doctor and does not replace personal medical advice. For symptoms specific to you, book an online doctor consultation.
Key points
- Many STIs cause no symptoms — testing is the only way to know.
- Free NHS sexual health clinics offer testing and treatment.
- Private home testing kits and online GP consultations are also available.
- Common STIs: chlamydia, gonorrhoea, herpes, syphilis, trichomoniasis, HIV, HPV.
- Treatment is straightforward and confidential.
Common STIs
- Chlamydia: often silent. Test if under 25 or new partner.
- Gonorrhoea: green discharge, pain on urination.
- Genital herpes: painful blisters and ulcers.
- Syphilis: painless ulcer then rash, then late complications.
- Trichomoniasis: frothy discharge, irritation.
- HIV: may have flu-like illness initially; otherwise silent.
How to get tested
- NHS sexual health clinics — free, confidential, walk-in or appointment.
- NHS home testing kits via local sexual health website.
- Private at-home test kits with lab analysis.
- Online GP consultation for advice and treatments.
How an online doctor can help
Online GPs can advise on which tests to do, interpret results, recommend treatment for many STIs (e.g. a suitable treatment for chlamydia), and offer post-exposure prophylaxis (PEP) discussions urgently.
Frequently asked questions
Common questions UK patients ask about sexually transmitted infections.
How an online doctor can help
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This article is for general information only and does not replace personal medical advice from a qualified doctor. Content is reviewed against UK NHS and NICE guidance by the OnlineDoctor24 editorial team and is not authored by a medical doctor. If your symptoms worsen or you are unsure, please book a consultation with a GMC-registered GP.
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