The bulge at the occlusal area of the inner wall of the mouth may be caused by mucous gland cysts and damage to the oral mucosa. 1. Mucous gland cysts: generally due to the rupture of the mucous gland duct system or obstruction of the discharge duct, so that the secretion of the gland leaks out in the tissue interstitial space or trapped in the inner surface of the gland to form a cyst, manifested as a swelling of oral mucous membranes, difficulty in eating, a sense of obstruction, bulging of the flesh of the inner walls of the oral cavity, etc., which can be treated with medicines such as cetrimide, cephalexin, cefuroxime sodium and other medicines. 2. Damage to the oral mucosa: generally due to persistent damage to the mucosa of the oral cavity, resulting in the formation of hyperplasia-like swelling, manifested as ulceration of the mouth and tongue, tongue dryness, hoarseness, bulging and other symptoms, you can use chlorhexidine gargle, recombinant human epidermal growth factor gel, watermelon cream spray, and other medications for treatment. Oral lining of the bite bulge may cause mouth sores, mouth ulcers and other serious symptoms, need to go to the hospital as soon as possible to confirm the diagnosis, under the guidance of the doctor’s instructions for standardized treatment, the use of drugs need to comply with the doctor’s instructions.