A sudden growth of a meat bulge on the inner wall of the mouth, patients are advised to visit the stomatology department or to the oral and maxillofacial surgery department, or to the oral mucosa department, only with a clear diagnosis can we know how to deal with it. Common causes such as oral ulcers, mucus cysts, oral cancer, others, etc., with different etiologies and different treatment methods.1. Normal phenomenon: If the patient has no other uncomfortable symptoms, he needs to carefully observe whether the sudden growth of a meat bump is located on the buccal side of the second maxillary molar, if it is located in this area, it may be the mouth of the parotid duct and saliva is discharged from this mouth, which is a normal physiological phenomenon. If there is a protrusion, consider that there may be an infection, and anti-inflammatory treatment can be carried out under the guidance of a professional doctor; 2. Oral ulcer: an ulcerative injury lesion of the oral mucosa, mostly found on the inner side of the lips, tongue, tongue belly, buccal mucosa and other parts. When it first occurs, it can be manifested as a sudden growth of a fleshy bump on the inner wall of the mouth, and as the disease progresses, the bump gradually ulcerates. At this time, patients need to remove the triggering factors, while taking oral vitamin B2 and vitamin C to relieve symptoms, and if necessary, apply drug therapy; 3, mucus cyst: the outer mouth of the mucus gland discharge duct is blocked, resulting in the retention of mucus and the formation of cysts. Mostly caused by bites and bruises. If diagnosed, patients can relieve the discomfort through iodine tincture injection, freezing and shearing method, surgery and other methods under the guidance of professional doctors; 4.Oral cancer: Oral cancer is a common malignant tumor of head and neck, including tongue cancer, lip cancer, gum cancer, hard and soft palate cancer, floor of mouth cancer, salivary adenocarcinoma, etc. It can be accompanied by lumps, plaques and nodules in the inner wall of the mouth. The treatment methods include cryotherapy, surgery and radiotherapy, etc., which can be decided according to the doctor’s guidance and the patient’s own situation; 5. Other: besides the above reasons, gingivitis, sarcoidosis, infection with virus, etc. may also lead to the appearance of meat bulge in the inner wall of the mouth, which needs to be professionally identified in the hospital and then targeted treatment.