A urinary tract infection, or UTI, is a common condition caused by bacteria entering the urinary system. While it can affect anyone, it is more frequent in women. You might notice a sharp stinging or burning sensation when you pee, an urgent need to go more often than usual, or pain in your lower tummy. Your urine might also look cloudy or have an unusually strong smell. Most mild infections clear up within a few days with plenty of water and rest, but sometimes a short course of antibiotics is needed to help you feel better. It is important to address these symptoms promptly to prevent the infection from reaching your kidneys. While UTIs are not classified as sexually transmitted infections, they can sometimes be triggered by sexual activity.
Quick Overview
Symptoms
Burning or stinging when urinating, increased frequency or urgency, cloudy or strong-smelling urine, and lower abdominal discomfort.
Causes
UTIs are usually caused by bacteria (commonly E. coli) entering the urinary tract. Sexual activity, dehydration, and incomplete bladder emptying can increase risk.
Diagnosis
Diagnosis is based on symptoms and urine testing. Dipstick testing may support diagnosis, and laboratory analysis is used in recurrent or complicated cases.
Treatment
Treatment usually involves a short course of antibiotics. Symptoms often begin to improve within a few days. Hydration can help support recovery.
Prevention
Stay well hydrated, avoid delaying urination, wipe front to back, and urinate after sex. Avoid irritants such as scented products.
Prognosis
The outlook is excellent with treatment. Most UTIs resolve quickly, although recurrence can occur. Further assessment may be needed for repeated infections.
FAQs
Common symptoms include a burning or stinging sensation when passing urine and needing to urinate more often or urgently.
Other signs may include:
• Cloudy, dark, or strong-smelling urine
• Blood in the urine
• Lower abdominal or back pain
• Feeling unwell, tired, or shivery
Seek medical advice urgently if you have a high temperature, severe back pain, or feel very unwell.
Yes, it is possible to have bacteria in the urine without symptoms (asymptomatic bacteriuria).
This usually does not need treatment in healthy, non-pregnant adults, but it is important to treat during pregnancy to reduce risks. Testing may be advised if there are concerns.
A UTI does not usually cause visible changes externally. It is mainly identified by changes in urine and symptoms.
Urine may appear cloudy, darker than usual, or pink/red if blood is present, and may have a strong smell. These changes are often accompanied by discomfort when urinating and increased urgency.
UTIs can affect anyone, but they are more common in women.
Risk is higher in:
• Sexually active individuals
• Pregnancy
• Menopause
• Urinary tract blockage (e.g. kidney stones, enlarged prostate)
• Catheter use or incomplete bladder emptying
Untreated UTIs can spread to the kidneys and cause more serious infection.
Possible complications include:
• Kidney infection (pyelonephritis)
• Bloodstream infection (sepsis)
• Pregnancy complications (e.g. preterm birth)
• Recurrent infections
Prompt treatment reduces these risks.
Symptoms usually develop quickly, often within hours to a few days.
Early signs typically include a sudden urge to urinate, burning when passing urine, and changes in urine appearance or smell.
UTIs are most commonly caused by bacteria from the bowel entering the urethra, usually E. coli.
Common triggers include:
• Sexual activity
• Wiping from back to front
• Use of spermicides or diaphragms
Risk is higher during pregnancy, menopause, or when the bladder does not empty fully.
Some sexually transmitted infections (STIs) can cause symptoms similar to a UTI rather than a true UTI.
These include:
• Chlamydia
• Gonorrhoea
• Mycoplasma genitalium
• Trichomonas vaginalis
Genital herpes may also cause pain when passing urine if sores are present.
Hormonal changes can increase UTI risk, particularly reduced oestrogen levels.
This commonly occurs:
• During and after menopause
• During pregnancy
• At certain points in the menstrual cycle
These changes can affect the urinary tract and make infections more likely.
Some gynaecological conditions can increase UTI risk or cause similar symptoms.
Examples include:
• Menopause-related changes
• Pelvic organ prolapse
• Fibroids or endometriosis affecting bladder function
• Vaginal infections causing irritation
Conditions affecting the urinary system can increase the risk of UTIs, especially if urine flow is blocked.
These include:
• Kidney or bladder stones
• Enlarged prostate
• Urethral narrowing (stricture)
• Neurogenic bladder
Skin conditions do not directly cause UTIs but can increase risk or mimic symptoms.
Examples include:
• Lichen sclerosus or lichen planus
• Balanitis or vulvitis
• Eczema, psoriasis, or contact dermatitis
• Genital herpes
These may affect the skin around the urethra or make urination difficult.
Certain habits can increase the risk of UTIs.
These include:
• Low fluid intake
• Holding urine for long periods
• Sexual activity without urinating afterwards
• Use of scented products in the genital area
• Tight or non-breathable clothing
Some factors make UTIs more likely or more severe.
These include:
• Female anatomy
• Sexual activity
• Pregnancy or menopause
• Diabetes or weakened immunity
• Urinary retention (e.g. stones, enlarged prostate)
You can reduce your risk by maintaining good hydration and hygiene.
Helpful measures include:
• Drinking enough water
• Not delaying urination
• Wiping from front to back
• Urinating after sex
• Avoiding scented products
• Wearing breathable underwear
Seek medical advice if infections are frequent or persistent.
Diagnosis usually starts with a review of symptoms and a urine test.
A urine dipstick can quickly detect signs of infection. If needed, a urine culture is used to identify the exact bacteria and guide treatment. STI testing may be considered if symptoms overlap.
The main tests are a urine dipstick and a urine culture.
• Dipstick test: provides rapid results for signs of infection
• Urine culture: identifies the bacteria and suitable antibiotics
• STI tests: used if symptoms could be due to a sexually transmitted infection
Further tests may be advised if symptoms are severe or recurrent.
An accurate diagnosis is based on symptoms, medical history, and urine test results.
Providing clear information about your symptoms, previous infections, and any risk factors helps guide appropriate testing and treatment.
Yes, several conditions can cause similar symptoms.
These include:
• Sexually transmitted infections (e.g. chlamydia, gonorrhoea)
• Vaginal infections such as thrush or bacterial vaginosis
• Prostatitis in men
• Hormonal or irritation-related changes
Testing helps distinguish between these conditions.
Additional tests may be used if infections are recurrent or complicated.
These can include:
• Imaging (e.g. ultrasound or CT scan)
• Cystoscopy (camera examination of the bladder)
• Blood tests
These help identify underlying causes or complications.
No, a physical examination alone is not enough to confirm a UTI.
Urine testing is usually required to confirm the diagnosis and guide treatment.
No, self-diagnosis is not recommended.
Home dipstick tests are available but may not be reliable. A proper assessment is important, as symptoms can overlap with other conditions, including STIs.
Yes, UTIs are common and usually treated effectively with antibiotics.
Symptoms often improve within a few days. Fluids and simple pain relief can help while treatment takes effect. Further assessment may be needed if symptoms persist or recur.
The main treatment is a short course of antibiotics.
Additional support may include:
• Drinking plenty of fluids
• Taking pain relief such as paracetamol
• Avoiding sexual activity until symptoms settle
Further tests may be needed if symptoms do not improve or keep returning.
Treatment typically lasts 3 to 7 days, depending on the individual and severity.
Shorter courses are often used for uncomplicated infections, while longer courses may be needed in more complex cases. Always complete the full course.
Yes, most UTIs can be fully cured with appropriate antibiotics.
Symptoms usually improve quickly, but completing the full course reduces the risk of recurrence.
No, partners do not need treatment for a typical UTI.
However, if symptoms are caused by a sexually transmitted infection, partners should be tested and treated to prevent reinfection.
Most people recover fully with no long-term problems when treated promptly.
Recurrent UTIs can occur but usually have a good outlook with appropriate management. Rare complications, such as kidney damage, are uncommon with early treatment.
No, treatment does not provide immunity against future UTIs.
You can develop another infection, especially if risk factors remain. Recurrent UTIs are common in some individuals.
Yes, simple lifestyle measures can help reduce recurrence.
These include:
• Drinking enough fluids
• Not delaying urination
• Wiping from front to back
• Urinating after sex
• Avoiding scented products
• Wearing breathable underwear
Further options may be considered if infections are frequent.
No, there is no medical requirement to tell your partner.
UTIs are not sexually transmitted. However, if there is any uncertainty about the cause of symptoms, testing may be advised to rule out sexually transmitted infections.
Yes, UTIs during pregnancy can lead to complications if not treated promptly.
Possible risks include:
• Kidney infection (pyelonephritis)
• Sepsis (in severe cases)
• Preterm birth
• Low birth weight
Routine urine screening during pregnancy helps detect and treat infections early.
UTIs are relatively common in pregnancy, affecting around 2–10% of individuals.
Hormonal and physical changes can slow urine flow, making infections more likely.
Yes, UTIs in pregnancy are treated with antibiotics that are considered safe for both mother and baby.
Common options include nitrofurantoin, amoxicillin, or cefalexin. The choice depends on the stage of pregnancy and urine culture results.
Yes, simple measures can help reduce the risk of UTIs.
These include:
• Drinking enough water
• Emptying the bladder regularly
• Wiping from front to back
• Urinating after sex
• Avoiding scented products
Seek advice promptly if symptoms develop.
A UTI itself does not usually directly affect postpartum recovery or breastfeeding.
However, if untreated, it may contribute to discomfort or systemic illness, which can affect overall recovery.
Most antibiotics used to treat UTIs are compatible with breastfeeding.
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Page last reviewed by Mrs. Magdalena Nowacka on 6 May 2026 for general guidance only. It is not intended to replace the advice of your clinician.