Feline eosinophilic dermatitis is a skin problem in cats. There are three main types, which all affect different parts of the body.
Is your cat drinking or weeing more than usual? You may hear your vet use the words polyuria and polydipsia (PUPD for short). Polyuria is weeing too much, Polydipsia is drinking too much.
Being unable to pass urine is a life threatening condition that requires immediate veterinary attention. Call your vet for advice ASAP if your dog or cat is having trouble peeing.