A bump on the inside of the lip may be caused by oral ulcers, mucous gland cysts and oral tumors, and can be treated with medication, puncture and surgery according to the symptoms. 1. Mouth ulcers: when the patient’s immune system is low or lack of micronutrients, it will cause mouth ulcers, and with the development of the disease, there will be a bulge on the inside of the lips of the symptoms, you can choose drugs for treatment to relieve, such as compound chlorhexidine gargle. 2. Mucous gland cysts: when the mucous gland secretion is damaged, the continuous secretion of the mucous gland increases the pressure in the follicle, forming a mucous gland cyst, there will be a raised meat bag on the inner side of the lips, you can choose to puncture the way of drainage to extract the contents. 3. Oral tumor: bad dietary habits will make the oral tissue cells lesions, there will be a bump on the inside of the lips, the patient can choose the way of surgical treatment, after the operation with radiotherapy and chemotherapy for treatment. When the patient’s lips on the inner side of the bulge of flesh, it is recommended to go to the hospital in time for examination and diagnosis, and under the guidance of the doctor, actively cooperate with the treatment.