Burning when you pee: UTI or STI?

Key takeaways

• Burning or stinging when you pee is most often caused by a urinary tract infection or an STI such as chlamydia or gonorrhoea, and testing tells you which.
• A chlamydia test and a gonorrhoea test each cost £104 at Sexual Health Clinic London, with results in 3 days.
• The NGU and NSU urine test, £125 with results in 3 days, covers chlamydia, mycoplasma, ureaplasma and trichomonas in one sample if a single infection test comes back negative but symptoms continue.
• At your first visit to Sexual Health Clinic London a urine dipstick is done; if anything shows, the sample can be sent for a full STI screen or a urine culture.
• Fever, loin pain or blood in your urine need same-day medical attention, not a routine test booking.
• You can walk in seven days a week at 117A Harley Street, and results for some tests are available from 6 hours with the FAST Screen.

Burning or stinging when you pee is usually caused by one of two things: a urinary tract infection, or a sexually transmitted infection such as chlamydia or gonorrhoea. The pattern of your other symptoms, such as discharge, how suddenly it started, and whether you have had a new sexual partner, helps narrow it down, but a urine test is what actually tells you. If you need an STI screen, STI screening packages cover the infections most likely to be responsible.

Is it a UTI or an STI? The quick way to tell

There is no symptom on its own that proves which one you have, but a few clues point one way more than the other.

Common features that help separate a urinary tract infection from a sexually transmitted infection.

None of these rule anything in or out on their own. If you have had a new or unprotected sexual contact and you have burning when you pee, testing for both is the safer route than guessing.

Which STIs cause burning when you pee?

Chlamydia and gonorrhoea are the two STIs most likely to cause burning or stinging urination. Both are picked up with a urine sample or swab. A chlamydia test costs £104 with results in 3 days. A gonorrhoea test also costs £104, with results in 3 days. Trichomoniasis, Mycoplasma genitalium and non-gonococcal urethritis (NGU) can cause the same symptom and are less well known, which is one reason a single test is not always enough.

Why burning can continue after a negative chlamydia test

If you have tested negative for chlamydia and gonorrhoea but the burning has not settled, the cause may be Mycoplasma genitalium, Ureaplasma or another organism causing non-gonococcal urethritis. The NGU and NSU urine test is £125, with results in 3 days, and checks for chlamydia, mycoplasma, ureaplasma and trichomonas from one urine sample, so it is a useful next step rather than repeating single tests one at a time. Our Silver screening package, £325 for men and £375 for women, adds Mycoplasma genitalium, Ureaplasma, Gardnerella and herpes I & II testing to the core STI panel.

Burning when you pee in men vs women

In men, burning on urination is often noticed quickly and may come with discharge from the penis. In women, the same symptom can be harder to place, because it overlaps with the symptoms of a straightforward urinary tract infection, and vaginal discharge is a less immediate clue than penile discharge. In both sexes the same infections are tested for, and the clinician will advise whether a urine sample or a swab suits you best.

Which test should you book?

If you have a single clear concern, such as recent unprotected sex, a single chlamydia or gonorrhoea test may be enough. If your risk is broader, or you want the reassurance of a wider check, our STI screening packages cover the common infections in one visit. Our guide to private STI testing in London explains how a confidential visit works. If you need an answer quickly, the same-day STI test with results in 6 hours (FAST Screen Simple, £350, covering HIV, syphilis, chlamydia and gonorrhoea) is available.

When it could be a UTI instead

If burning urination comes with urgency and frequency but no discharge and no recent new sexual contact, a urinary tract infection is more likely than an STI. At your first visit here a urine dipstick is done, and if anything shows, the sample can be sent for a full STI screen or a urine culture. If a UTI looks more likely than an STI, a private GP consultation at Medical Express Clinic, £150, can assess and treat it. See a doctor the same day, or go to A&E, if you have fever, pain in your side or back (loin pain), visible blood in your urine, or you are vomiting and unable to keep fluids down: these can be signs the infection has reached your kidneys and need prompt treatment.

How testing works at our Harley Street clinic

For a urine-based test such as chlamydia or gonorrhoea, you are asked to avoid urinating for about 2 hours before your appointment, so there is enough sample to test accurately. A clinician will talk you through which sample or swab is needed for the infections you want checked. If you only need chlamydia and gonorrhoea checked quickly, the FAST urine test for both is £124, with results in 6 hours. Results are communicated to you confidentially, typically within 3 days for chlamydia, gonorrhoea and the NGU/NSU panel, or from 6 hours if you choose the FAST Screen. You can walk in seven days a week at 117A Harley Street, and your visit is confidential.

Book a same-day STI test at 117a Harley Street, with results from 6 hours.

References

• NHS: Urinary tract infections (UTIs)
• NHS: Chlamydia
• NHS: Gonorrhoea
• NICE Clinical Knowledge Summaries: Urinary tract infection (lower) - women
• BASHH: UK national guideline for the management of non-gonococcal urethritis
• UKHSA: Sexually transmitted infections surveillance data