Lymph nodes on the head are generally common for the following reasons: a. Lymph nodes enlarged by local skin infection, such as sebaceous cyst and infection on the head, which can cause enlargement of peripheral lymph nodes due to inflammatory cell stimulation, and after active control of local infection, the enlarged lymph nodes can be absorbed by themselves, with a better prognosis. Second, enlarged lymph nodes caused by malignant tumors, such as intracranial malignant tumors and nasopharyngeal malignant tumors, tumor cells can invade along the lymphatic vessels and blood vessels, resulting in obvious enlargement and hyperplasia of the lymph nodes on the head. At this time, patients can improve CT or magnetic resonance examination to clarify the specific location of tumor, and then perform resection of primary tumor and lymph node dissection as soon as possible. After surgery, combined with local radiotherapy and systemic chemotherapy, tumor cells and cancerous lymph nodes can be removed from the body as much as possible to prolong the life of patients.