Feline Idiopathic Cystitis (FIC)

Feline idiopathic cystitis (FIC), also called Pandora Syndrome, is one of the most common causes of lower urinary tract signs in younger cats. 'Idiopathic' means no specific cause can be found — the bladder becomes inflamed even though there are no stones, tumors, or bacterial infection (urinary infections are rare in cats). The bladder's protective inner lining becomes patchy, exposing the tissue underneath to irritating urine. Why it matters: it's painful, tends to come back, and — most importantly — male cats with FIC can develop a life-threatening urinary blockage. If a cat strains without passing urine, it is an emergency: toxins build up and can be fatal within days. Typical signs include bloody urine, straining in the litter box (which can look like constipation), urinating in unusual places, and licking the urinary opening. Episodes usually last one to two weeks and are treated with pain relief and anti-spasm medication while the vet rules out other causes. FIC is closely tied to stress — flare-ups can follow moving, guests, new furniture, construction, or schedule changes. Preventing episodes means making the cat's world calmer and richer: play and climbing opportunities, scratching posts, one litter box per cat plus one extra, quiet box locations, consistent food, and canned urinary-formula food to increase water intake. Call your vet for any straining or bloody urine — immediately if a male cat can't urinate.