What condition is characterized by the infection of the soft tissue in the mouth?

The condition characterized by the infection of the soft tissue in the mouth is gingivitis. Gingivitis is an inflammation of the gingiva, which is the gum tissue that surrounds and supports the teeth. This condition is typically caused by the accumulation of plaque—a sticky film of bacteria on the teeth—leading to irritation and infection of the gums. Symptoms commonly include redness, swelling, and bleeding of the gums, especially during brushing or flossing.

Gingivitis is often an early stage of gum disease and, if left untreated, can progress to more severe conditions, such as periodontitis, which affects the bone supporting the teeth. While other options may relate to oral health, they do not directly describe the infection and inflammation process of the gum tissue as effectively as gingivitis does. Cavities refer to tooth decay, halitosis pertains to bad breath, and periodontitis involves more severe inflammation that affects deeper gum structures and the bone.