Gum bulges can be caused by periodontal abscesses and apical abscesses, which usually do not heal themselves. However, the gum bulge may form to a certain stage where the pressure is so great that it will break right through and pus will flow out, but this is not self-healing. 1. Gum bulge may be apical abscess, the most common cause is dental caries caused by pulpal inflammation and then developed to the periapical inflammation. Formation of gum bulge, even if the rupture, if not timely root canal treatment, may again acute attack, that is, recurrent gum bulge. 2. Gingival bulge may be periodontal abscess, caused by inflammation of periodontal pockets. Without timely periodontal treatment, it will not heal itself. It is recommended to go to the hospital in time, under the guidance of the doctor to give targeted treatment or treatment.