1. A cat vomiting white foam may be caused by gastrointestinal discomfort, internal parasites, hairball disease, poisoning, or feline plague. It is necessary to observe whether the cat has other symptoms.

2. If the cat has diarrhea, poor energy, loss of appetite, blood in the stool, etc., it is best to send it to the pet hospital for examination and treatment immediately.

3. If the cat does not have other symptoms, you can feed the cat some probiotics and cat grass, and deworm the cat on time.