Female patients with lymphatic pain at the root of the thigh, generally speaking, the common clinical causes are mainly the following: a. malignant tumor of the anal canal, tumor cells can smooth the lymphatic vessels and invade the lymph nodes at the root of the thigh, causing cancer pain, and hard lymphatic masses with multiple fusions can be felt at the root of the thigh during physical examination. Patients are suggested to have pelvic magnetic resonance examination as soon as possible to clarify the level of invasion of anal canal tumor, and then have anal canal tumor resection and lymph node dissection at the root of thigh as soon as possible. Secondly, the infection of soft tissue of skin at the root of female thigh will also stimulate the enlargement of lymph nodes and accompanied by obvious pain symptoms. At this time, local topical application of Jinhuang San ointment can be given to strengthen anti-infection treatment. After the infection is controlled, the swollen lymph nodes can slowly subside and absorb on their own.