Cats do not drool under normal circumstances. When you see a cat drooling, it is usually caused by disease. The possible factors are as follows: 1. The cat’s gums are red, swollen and inflamed, and oral ulcers and wounds will cause the cat to drool. ;2. Indigestion and gastrointestinal discomfort in cats can lead to regurgitation and drooling; 3. Cats eating by mistake can cause food poisoning, infection with bacteria and viruses and other diseases.