PetMD offers an online symptom checker for cats at PetMD.com. The checker lets users select which area of the body the cat is experiencing symptoms in, including behavioral changes. Users can select the cat's symptoms and receive a list of relevant PetMD articles.
Many symptoms in cats can point to multiple diagnoses. In order to be sure what is affecting the cat and plan a successful course of treatment, it's usually necessary to take the cat to a vet to receive a full check up. When visiting the veterinarian, be prepared to provide a full medical history of the cat in order to receive the most accurate diagnosis.