Feline Idiopathic Lower Urinary Tract Disease (FLUTD): Symptoms, Causes & Treatment [2025]
Feline idiopathic lower urinary tract disease (FLUTD) is a common urinary condition in cats, often linked to stress. Symptoms include blood in urine, straining to urinate, and inappropriate elimination. Treatment involves stress reduction, prescription diets, and environmental enrichment.
When to See a Vet
Seek Emergency Care Immediately
- •Completely unable to pass any urine at all
- •Noticeably distended abdomen that is painful to the touch
- •Heavy blood in urine with severely depressed mental status
Schedule a Clinic Visit Soon (within 24–72 hours)
- •Frequent squatting attempts with very little urine produced each time
- •Audible crying or obvious signs of pain while urinating
- •Decreased appetite and activity level lasting several days
01What symptoms indicate a problem?
Common signs of feline lower urinary tract disease are often related to changes in urination behaviour or abnormal urine — early observation helps you decide when to see a vet.
- Blood in urine or noticeably discoloured urine (pink or dark red)
- Straining to urinate frequently but producing only small amounts each time
- Increased trips to the litter box or prolonged squatting
- Vocalising or showing obvious signs of pain while attempting to urinate
- Frequent licking of the perineal area or urinating outside the litter box
- Reduced energy or appetite, and decreased activity
Seek emergency care immediately if you notice the following symptoms:
- ⚠️ Complete inability to urinate, or unable to pass even a small amount
- ⚠️ Visibly distended abdomen that is painful to the touch
- ⚠️ Heavy blood in urine accompanied by marked lethargy or weakness
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02How to assess the situation at home? Key observations and criteria for emergency visits
Key information you can record at home to help your vet quickly understand the onset and duration of symptoms.
- Note when symptoms first appeared and how frequently they occur
- Record a video of urination or any abnormal behaviour on your phone
- Estimate daily water intake and number of urination attempts (note any changes)
- Observe and record urine colour, and whether there is blood or sediment present
- Monitor appetite, energy levels, and whether body weight has decreased
- It is recommended to bring a urination video and arrange a clinic visit as soon as possible
03How will the vet diagnose the condition? Common diagnostic tests
At the clinic, the vet will conduct a physical examination combined with laboratory and imaging tests to assess the condition and identify possible causes.
Physical examination
abdominal and perineal palpation to assess whether the bladder is distended or painful
Blood and biochemistry panel
to evaluate kidney function and overall health
Urinalysis (including microscopic examination) and bacterial culture to rule out infection
X-ray
to check for uroliths, bladder abnormalities, or other structural issues
Abdominal ultrasound or CT scan if needed to assess the bladder wall or urinary tract
04What treatment and care is needed after diagnosis? Medication, diet, and care guide
Treatment focuses on relieving symptoms and addressing the underlying cause; follow-up monitoring and dietary management are important for preventing recurrence.
- Medications to manage pain or infection, with supportive care as needed
- Hospitalisation and fluid therapy for stabilisation in severe cases
- Transition to a prescription diet and encourage increased water intake to reduce recurrence risk
- Regular follow-up visits and repeat urinalysis as directed by your vet
- For recurrent cases, referral to a specialist for further imaging or internal medicine work-up is recommended
05What to prepare before seeing the vet? Key information to help your vet pinpoint the cause
This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.