A hard white bump in the mouth may be a bony protrusion that usually needs no treatment, or if it is painful and interferes with the restoration, an alveolar bone reshaping procedure is needed. It may also be a swelling, which usually needs to be surgically removed. 1. A hard white bump in the mouth may be a bone protrusion, a congenital bone protrusion or a tip formed by the alveolar bone after tooth extraction, which is generally not necessary to deal with, but if it is painful and affects the restoration, alveolar bone revision surgery is required. 2. If it is a swelling, it usually needs to be surgically removed. There may be other reasons for a hard white bump in the mouth, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.