A round piece of flesh protruding from the chin may be caused by lipoma or epidermal cyst, which needs to be analyzed specifically. 1. Lipoma: when the chin skin fat tissue abnormal accumulation, can be formed in the chin local round small lumps, when the volume of lipoma is small, the patient will not appear obvious symptoms such as pain and discomfort, but with the progress of the disease, the volume of lipoma will gradually increase, which will cause patients to have pain in the chin, you can consider surgical excision. 2. Epidermoid cysts: Epidermoid cysts are one of the most common cysts in the skin. They can occur in any part of the body and are usually found on the scalp, face and neck, and trunk. The cysts are round, elevated nodules, elastic, mobile and without conscious symptoms. They can be surgically removed if necessary. There may be other causes of round flesh causing chin bumps, which require early hospitalization to identify the cause and regular treatment.