A 22-year-old woman is presented, showing the lobulated and uneven-surfaced hypertrophy of the gum in the area of left molars to anterior teeth of both maxilla and mandible. She complains that it has begun to swell since five or six years old and has increased its size rapidly in the age of seventeen to eighteen with frequent recurrences. It may be caused by congenital predisposition and endocrinal disturbance