Lower lip nodules may be caused by lip cysts and enlarged lymph nodes. 1. Oral and lip cysts: a kind of mucous gland cysts, due to the human body sebaceous gland secretion caused by the increase, and usually do not pay attention to oral hygiene and sanitation related, no other obvious symptoms, can be treated by laser surgery. 2. Enlarged lymph nodes: generally caused by infection, but also with stomatitis, upper respiratory tract infections and other diseases, when the lymph nodes are enlarged, there will be the case of long nodules on the lower lip, often accompanied by fever and sweating and other phenomena. To light diet, pay attention to oral hygiene, eat more fresh vegetables and fruits, which contain a large number of trace elements, help to improve immunity. It is recommended to consult a doctor to clarify the cause of the disease and then carry out treatment.