Lymph nodes are an important immune organ in the body and are distributed throughout the body. They can be divided into superficial lymph nodes and deep lymph nodes according to their location. Superficial lymph nodes can be detected by physician’s examination and self-palpation at home. Deep lymph nodes can only be detected by special equipment in the hospital, such as abdominal ultrasound to detect enlarged lymph nodes in the abdominal cavity. In addition, swollen lymph nodes have many causes, including infections, tumors, reactive hyperplasia, etc. Therefore, the treatment of swollen lymph nodes mainly depends on the cause of the disease, Anti-inflammatory and anti-infection treatment should be given in time, and the swelling of lymph nodes will naturally decrease. Therefore, the cause of the swollen lymph nodes should be detected and treated according to the cause, while hot compresses are generally not recommended.