Quick answer
A cat UTI is a bacterial infection, usually of the bladder, that causes straining, frequent small pees, blood in the urine and peeing outside the box. True infections are uncommon in young cats and more common in cats over 10, so your vet needs a urine test to confirm one before prescribing antibiotics. A male cat straining with little or no urine may be blocked, which is an emergency.
A cat UTI and a blocked bladder can look alike at first. A blockage can kill a cat within a day or two. If you’re unsure, treat straining as an emergency and read our guide to urinary blockage in male cats.
What are the UTI symptoms in cats?
Most bladder problems in cats cause the same set of signs, whether or not an infection is behind them. Common UTI symptoms include:
- Going to the litter box often and passing only small amounts
- Straining or crying while peeing
- Pink, red or bloody urine (see blood in cat urine)
- Peeing on soft or cool surfaces like bath mats, beds or the sink (see cat peeing outside the litter box)
- Licking the genital area a lot
- Strong-smelling or cloudy urine
A kidney infection (pyelonephritis) is less common and can also cause fever, back pain, vomiting and not eating. That needs a vet visit the same day.
Is it really a cat UTI, or something else?
Vets group bladder signs under the name feline lower urinary tract disease (FLUTD). A true urinary tract infection in cats is only one cause, and in young to middle-aged cats it’s an uncommon one.
| Cause | Who it usually affects | Urgency |
|---|---|---|
| Idiopathic cystitis (FIC) | Young to middle-aged cats, often linked to stress. The most common diagnosis | See vet soon |
| Bacterial UTI | Cats over 10, females, and cats with kidney disease, diabetes or hyperthyroidism | See vet soon |
| Bladder stones | Any age. Struvite and calcium oxalate are most common | See vet soon |
| Urethral blockage | Almost always male cats | Emergency |
This matters because antibiotics only help when bacteria are present. Treating idiopathic cystitis with antibiotics doesn’t work and adds to antibiotic resistance.
Older cats are the exception. Bacterial infections are much more common after age 10, often alongside kidney disease, diabetes or hyperthyroidism, which make urine easier for bacteria to grow in.
How do vets diagnose a urinary tract infection in cats?
Your vet will examine your cat and gently feel the bladder. A small, firm bladder is typical of cystitis. A large, hard, painful bladder in a straining cat suggests a blockage.
- Urinalysis: checks for blood, white blood cells, crystals, bacteria and how concentrated the urine is.
- Urine culture: grows any bacteria and shows which antibiotics will work. It’s the only way to confirm an infection.
- Cystocentesis: the vet collects urine straight from the bladder with a fine needle. It sounds alarming, but it’s quick, well tolerated and gives a clean sample. Urine from the litter box or a table is often contaminated.
- X-rays or ultrasound: to look for stones, especially if signs keep coming back.
Not sure whether to go now or book a visit this week? Our should I take my cat to the vet? checker can help.
How are cat UTIs treated with antibiotics?
A confirmed bacterial bladder infection is treated with antibiotics chosen by your vet, ideally guided by the culture result. Current guidelines favor a short course, often 3 to 5 days, for a simple one-off infection. Recurring or complicated infections usually need longer treatment and a search for the underlying cause.
Your vet will choose the antibiotic and set the dose for your cat. A few things help treatment work:
- Give every dose for the full course, even if your cat seems better.
- Never use leftover antibiotics or any human medicine. Several human drugs are toxic to cats.
- Ask whether a follow-up urine test is needed, especially for older cats or repeat infections.
- Call your vet if your cat vomits, stops eating or has diarrhea on the medicine.
Pain relief is often given too, because cystitis is uncomfortable. Your vet will pick one that’s safe for cats. Human painkillers such as ibuprofen or acetaminophen are not, and even one tablet can be deadly.
Bacteria found in the urine of a cat with no signs at all usually don’t need treatment. Your vet will decide based on your cat’s health.
What if the infection keeps coming back?
Three or more infections in a year, or signs that return soon after antibiotics, point to an underlying cause. Your vet may look for bladder stones, kidney disease, diabetes, an overactive thyroid or an anatomy problem, and repeat the urine culture to check whether the bacteria are resistant. Treating the root cause is what stops the cycle.
How much does it cost to treat a cat UTI?
These are typical ranges at a regular US clinic. Emergency clinics usually charge more.
| Service | Typical cost |
|---|---|
| Exam | $55 – $110 |
| Urinalysis | $50 – $120 |
| Urine culture | $80 – $180 |
| Antibiotic course | $20 – $70 |
| X-rays for stones | $150 – $350 |
For a fuller breakdown, see cat vet visit costs.
How can I prevent urinary problems in my cat?
Most prevention focuses on more water and less stress, which helps with cystitis and stones as well as infections.
- Feed some or all wet food, and offer water in several places or a fountain.
- Keep one more litter box than you have cats, scooped daily, in quiet spots.
- Reduce stress with a steady routine, hiding spots and play.
- Take senior cats for regular urine and blood tests, since infections in older cats may cause few signs.
For more on other bladder, kidney and hormone problems, browse our cat health problems guides.
Frequently asked questions
Can a cat UTI go away on its own?
Bladder signs from idiopathic cystitis often settle on their own within days, but a true bacterial infection usually needs antibiotics. Because the two look the same, have your vet check a urine sample rather than waiting.
Can I give my cat cranberry for a UTI?
Cranberry products haven't been shown to treat infections in cats, and they don't replace a vet visit. Ask your vet before giving any supplement.
Are UTIs contagious between cats?
No. A bladder infection isn't spread from one cat to another, although several cats in a stressful home can develop cystitis at the same time.
Sources
- Merck Veterinary Manual: Bacterial Cystitis in Small Animals
- Cornell Feline Health Center: Feline Lower Urinary Tract Disease
- VCA Animal Hospitals: Cystitis and Lower Urinary Tract Disease in Cats
- ISCAID Guidelines for the Diagnosis and Management of Bacterial Urinary Tract Infections in Dogs and Cats (2019)
Written by the CatsMed Team from the sources above. This guide isn’t reviewed by a veterinarian and isn’t a substitute for one. See how we research.
