Stomatitis, a non-specific term for an inflamed and sore mouth, can disrupt a person’s ability to eat, talk, or sleep. Stomatitis can occur anywhere within the mouth, including the inside of the cheeks, gums,tongue, lips, and palate. Stomatitis is an inflammation of the lining of any of the soft-tissue structures of the mouth. Stomatitis is usually a painful condition, associated with redness,...