What are the symptoms of urinary tract infection?
The hallmark symptoms of a UTI are a burning sensation when urinating, a frequent and urgent need to go, passing only small amounts, and cloudy, dark, or strong-smelling urine. Fever, chills, flank pain, nausea, or confusion suggest the infection has reached the kidneys and needs urgent care.
A urinary tract infection produces a fairly recognizable set of symptoms. Knowing them helps you tell an ordinary bladder infection apart from the warning signs that the infection is spreading.
Common Bladder Infection Symptoms
Most UTIs begin in the bladder and urethra (the lower urinary tract) and cause:
- A burning or stinging sensation while urinating (dysuria) — the classic sign
- A frequent, urgent need to urinate, even right after you have just gone
- Passing only small amounts of urine despite the urge
- Cloudy, dark, or strong-smelling urine
- Pelvic pressure or lower-abdominal discomfort, often felt just above the pubic bone
- A small amount of blood in the urine, giving it a pink or reddish tint
These symptoms are uncomfortable but, on their own, usually reflect an infection confined to the bladder that responds well to antibiotics.
Warning Signs the Infection Has Spread
The following symptoms suggest the infection has moved up to a kidney (pyelonephritis) or into the bloodstream, and they are the dangerous ones:
- Fever and shaking chills
- Pain in the flank, side, or mid-back, rather than only the lower pelvis
- Nausea and vomiting
- Extreme fatigue, dizziness, or a racing heartbeat
- New confusion or disorientation — in older adults, this is sometimes the only obvious sign of a UTI
Symptoms That Look Different by Person
UTI symptoms are not identical for everyone. Older adults may show confusion, agitation, or a sudden loss of appetite instead of burning. Young children may have only a fever, irritability, or bedwetting. People with a urinary catheter may not feel the usual burning at all and instead develop fever or chills. Because the classic clues can be absent, any unexplained fever with these risk factors deserves prompt evaluation.
If symptoms are limited to the bladder, a same-day telemedicine or urgent care visit is often enough. But if you have fever, back pain, vomiting, or confusion, Bellaire ER offers 24/7 on-site urinalysis, urine culture, and imaging at 5302 Bellaire Blvd. Walk in any time or call (713) 660-0001 for guidance.
For a complete guide, see our urinary tract infection page.