The cat is just vomiting suddenly and may want to spit out hair balls. The owner can check whether there are hairs in the spit objects. Cats that continue to vomit may be caused by a long-term lack of deworming and the presence of parasites in the body. Cats with this reason usually have symptoms of bowing their backs and not getting fat after eating. If the cat is in poor spirits and vomits repeatedly, it should be a sign of disease. It is recommended that keepers seek medical attention promptly to avoid delays in treatment.