The flap of gum tissue covering the tooth can trap food particles and bacteria, creating inflammation and pain in the area. It may feel sore to chew, and you might notice swelling, bad breath, or difficulty opening your mouth. In more serious cases, the infection can spread and cause fever or pus drainage.
Treatment focuses on cleaning the area and relieving discomfort. If the gum flap continues to cause problems, or if the tooth remains troublesome, removal may be recommended to prevent future flare-ups.