A white meaty lump in the mouth may be caused by mucous gland cysts, mucous membrane hyperplasia, oral tumors and other reasons. 1. Mucous cysts: due to infection and other factors can lead to small mucous gland duct damage, mucus retention, the formation of mucous cysts. 2. Mucosal hyperplasia: long-term repeated biting and other stimuli can lead to local oral mucosal hyperplasia, appearing white bumps. 3. Oral tumor: due to chewing betel nut and other undesirable stimuli can lead to atypical hyperplasia of the oral mucosa, which can be manifested as a small white meatball on the inner wall of the mouth. It is recommended that the person who has a white bump in the mouth go to the regular hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.