UTI test in London: do you need a GP urine test or an STI screen?

Burning or stinging when you urinate, needing to go more often than usual, and a sudden, hard-to-ignore urge to go are the classic signs of a urine infection. Discharge, a new sore or lump, or itching around the genitals point more towards a sexually transmitted infection, and the two are best told apart by an examination and the right sample, not by symptoms alone. A private GP consultation can examine you and decide which test you need.

What's the difference between a UTI and an STI?

A UTI is an infection of the bladder or urinary tract, usually caused by bacteria that live harmlessly in the bowel finding their way into the urethra. It typically causes burning on urination, frequency, urgency, and sometimes cloudy or strong-smelling urine, without discharge or genital sores. An STI is passed on through sexual contact and more often causes discharge, an unusual smell, a new sore, itching, or pain during sex, though some STIs, including chlamydia, can also cause burning when you urinate and be mistaken for a UTI.

Because the symptoms overlap, particularly burning on urination, the reliable way to tell them apart is a clinical examination together with the correct sample: a urine test for a suspected UTI, or a swab or urine test for the specific infections a doctor suspects.

The table below sets out the pattern each tends to follow, though either can present atypically.

Who is more likely to get a UTI?

UTIs are more common in women than men, largely because of the shorter distance between the bladder and the outside of the body. When men do get a UTI, it's worth assessing, since it's less usual and can occasionally point to another cause, such as an infection of the prostate. Pregnancy, sexual activity, and previous UTIs also raise the likelihood of another one.

Who needs a urine test rather than waiting it out?

A urine test is the right next step for men with urinary symptoms, since a UTI is less common in men and deserves a proper look rather than assuming it will clear on its own. It's also the right step if you're pregnant, since a urine infection in pregnancy needs prompt treatment, if your symptoms keep coming back, or if you have symptoms suggesting the infection has reached a kidney. Testing the urine, rather than guessing from symptoms alone, confirms whether an infection is present and helps guide the right treatment.

When do UTI symptoms need same-day care?

Fever, shivering, pain in your side or lower back (loin pain), or feeling sick or vomiting can mean the infection has spread to a kidney, which needs assessment the same day rather than waiting. The same applies if you're pregnant with any urinary symptoms. Blood in your urine should always be checked by a doctor. If you cannot get a same-day appointment, call NHS 111. If you are very unwell, confused, very drowsy or have signs of sepsis, call 999 or go to A&E.

Could it be an STI instead of a UTI?

If you have discharge, a new sore, itching, or symptoms that started after a change in sexual partner, a sexually transmitted infection is worth considering alongside a UTI. Individual STI tests are available for specific infections, including chlamydia and gonorrhoea together for £104, with most results back in 1 to 3 days. For men with discharge specifically, a dedicated penile discharge assessment covers examination, testing and treatment. If you would rather go straight to a dedicated sexual health service, our sister clinic Sexual Health Clinic London explains burning when you pee and how it tells a UTI from an STI.

What happens at a GP appointment for urinary symptoms?

You see a doctor in person at 117a Harley Street, with no referral needed and no fixed time limit to the consultation. Your GP takes a history, examines you where needed, and dipstick-tests a urine sample at this first visit. If the dipstick shows anything, the same sample can be sent to the laboratory for a urine culture or a full STI screen, so you do not need a second appointment just to give a sample. The consultation costs £150, and appointments are available seven days a week, booked or as a walk-in when there is capacity. Tests are charged on top of the consultation, and the clinic explains any extra charge before it goes ahead.