What Are Tongue Ulcers On Cats Called. It is a disease of the mouth which causes painful ulcers on the gums and mucosal lining of the mouth cavity. Cat papillae are made of a strong, fibrous material called keratin.

This can cause ulcers on the gums, tongue, lips, roof of the mouth, throat, and lungs. They most commonly present on the upper lip but can also occur on the bottom lip, tongue, or behind a molar. Human fingernails and hair are made from karatin, too.