Sliding lumps on the chin can be caused by lymph nodes, or subcutaneous lipomas, boils, sebaceous cysts, and so on. 1. Lymph nodes: Lymph nodes in the jaw can lead to sliding bumps on the chin, usually bilateral and symmetrical. If there is inflammation in the lymph nodes or infection in the neighboring organs, it may lead to enlargement, swelling, pain and other symptoms. 2. Lipoma: abnormal proliferation and differentiation of local subcutaneous fat may lead to the formation of subcutaneous lipoma, which may also be manifested as sliding lumps on the chin, and the symptoms of pain or itching are usually very mild. 3. Boils: due to hair follicles and deep tissue suppurative infections, the early stage of the disease can also cause subcutaneous nodules, lumps accompanied by skin redness, swelling, heat, pain and other inflammatory manifestations, may also lead to the chin can be sliding bumps. 4. Sebaceous cysts: due to the sebaceous gland ducts are blocked, gland secretions can not be discharged in a timely manner, will also form cystic structures, manifested in the chin can slide bumps. There may be other reasons for the chin sliding bumps, if they appear suddenly or cause discomfort, you should seek medical attention.