What Are Some Common Symptoms of a Sick Cat?

Common signs of illness in cats include vomiting, diarrhea, loss of appetite and decreased activity, according to WebMD. Changes in urination, coughing, stiffness and skin problems are other indications that a cat is ill.

While it is not unusual for cats to vomit on occasion, a cat that throws up frequently or exhibits symptoms such as lethargy and loss of appetite is probably ill. Vomiting and diarrhea can stem from a number of underlying causes. However, blood in the vomit or feces is typically a sign that a cat is sick, explains WebMD.

Loss of appetite, with or without other symptoms, can quickly become life-threatening. If a cat goes for even a couple of days without eating, it can develop a deadly disease called fatty liver, WebMD reports.

A number of different medical conditions often produce similar symptoms in cats, according to WebMD. Changes in urination sometimes indicate diabetes, a urinary tract infection or bladder stones. Persistent coughing is sometimes related to heart or lung disease. Itchy skin and hair loss are sometimes a sign that the cat has fleas or ear mites, while stiffness or trouble bearing weight may indicate an injury, arthritis or even Lyme disease. Generally, only a veterinarian can determine exactly what is wrong with the cat.