Feline Idiopathic Lower Urinary Tract Disease

Idiopathic Feline Lower Urinary Tract Disease (IFLUTD) is a universal term for conditions represented by blood in the urine, urinating in inappropriate locations, difficult or painful urination, abnormal or frequent passage of urine.

IFLUTD is also called Feline Idiopathic Cystitis (FIC), Feline Urologic Syndrome (FUS), or Interstitial Cystitis. These diseases occur due to the bladder and/or urethra inflammation without any physical cause and are idiopathic.
While diagnosing, veterinarians check for an urinary tract infection, stones and crystals. In most of the cases, FLUTD has no physical causes, 2% of cats with symptoms have urinary infections, 14% - have crystals or stones. Senior cats develop infections and signs of chronic kidney disease more frequently than adult cats. The idiopathic type usually occurs in 1-4 year old cats.


  • Vocalization while urinating
  • Blood in the urine
  • Urination in improper locations
  • Urination is difficult, painful, abnormal, frequent and/or blocked
  • The bladder wall is thickened, contracted and firm


  • Stress
  • Changes in the environment


Various analysis, tools and detailed examination will be done to check if there is a physical cause such as stones, crystals or infections, trauma, abnormalities or nervous system disorders.


Sometimes a hospitalization is required for a few hours or a couple of days, especially, if your cat has blockage of the urethra. In other cases the treatment is outpatient and a recovery comes in a few days. Pain medication and removing of stressors at home are used as a treatment method of IFLUTD.
In case crystals are present in the urine which also can lead to blockage, changes in diet is recommended based on a type of crystals.

If your cat keeps showing symptoms of IFLUTD after 5-7 days of treatment, you should visit your veterinarian once again.


To avoid recurrence of Feline Idiopathic Lower Urinary Tract Disease, you will be required to make either specific or general changes in your cat’s environment to reduce stress. The changes might be: providing a place to hide, using anti-stress diffusors or removing other possible stress factors.

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