Stomatitis refers to the inflammation of the mucous lining in the mouth, leading to symptoms such as sores, ulcers, and bad breath, which can affect individuals of all ages. Various types of stomatitis exist, including mycotic, herpetic, and aphthous stomatitis, each with unique causes and potential treatments. Effective management includes maintaining good oral hygiene, avoiding irritants, and using specific medications or topical treatments depending on the underlying cause.