the cause(s) of psoriasis is really unknown. i can vindicate the cats as a cause however. cats can cause allergic responses to the skin but cats do not cause psoriasis.
can cats cause psoriasis. my father has sever psoriasis on his back arms and legs. he has never had skin conditions of any type until the past 10 years and he is now 70. my step-mother has became a cat hoarder and the psoriasis began about the same time as the hoarding. we have narrowed down the cat population to about 10 however my father still has psoriasis. he has been to the dr. and had prescriptions that do little to offer relief.