Gingivostomatitis is a viral or bacterial infection of the mouth and gums that leads to swelling and sores.
Gingivostomatitis is common, particularly among children. It may occur after infection with the herpes simplex virus type 1 (HSV-1), which also causes cold sores. See: Herpetic stomatitis
The condition may also occur after infection with a coxsackie virus. See: herpangina
It may occur in people with poor oral hygiene.