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.
Urinary bladder and/or upper portion of urethra can be infected by
bacteria which results in inflammation and other urinary-related
Commonly, senior cats develop the condition more frequently than adult cats and kittens.