If you've had a urinary tract infection before, you know the feeling: burning when you pee, the constant urge to go, and only a little coming out. UTIs are very common, especially for women. At-home test strips can help you figure out what's going on fast, as long as you understand what they can and can't tell you.
What UTI test strips check for
Most at-home UTI test strips look for two things in your urine:
- Leukocyte esterase: a sign of white blood cells, which your body sends to fight infection.
- Nitrites: many of the bacteria that cause UTIs, like E. coli, convert nitrates in urine into nitrites.
How accurate are they?
They're a helpful clue, not a diagnosis.
- A positive result, especially for nitrites, combined with typical symptoms, makes a UTI quite likely.
- A negative result doesn't rule out a UTI. Not all UTI-causing bacteria make nitrites, and very diluted urine can hide a positive. If you have clear symptoms, see a doctor even with a negative strip.
How to get the most accurate result
- Test first-morning urine, or urine that's been in your bladder at least 4 hours.
- Don't drink lots of water right before testing; it dilutes the urine.
- Test before taking urinary pain relievers like phenazopyridine (the orange pills). They tint urine and can interfere with the strip colors.
- Read the result at exactly the time the instructions say.
What to do if it's positive
UTIs are caused by bacteria, so they're usually treated with prescription antibiotics. Contact your doctor or a telehealth service; many can prescribe quickly based on symptoms and a test result. Over-the-counter pain relievers can ease the burning while you wait, but they don't cure the infection.
Can cranberry or D-mannose help?
Some people use cranberry or D-mannose supplements to help support urinary tract health, especially if they get UTIs often. Research is mixed, and they are not a treatment for an active infection. Drinking plenty of water, peeing after sex and not holding it for long periods are simple habits that may help.
When to see a doctor right away
- Fever, chills, back or side pain, nausea or vomiting. These can mean the infection has reached your kidneys and needs prompt treatment.
- Blood in your urine
- You're pregnant
- You're a man with UTI symptoms (less common and worth checking out)
- Symptoms don't improve within 2 days of starting antibiotics, or keep coming back
Sources
This article is for general information and isn't a substitute for advice from a doctor or pharmacist.