The reasons for the swelling of the lymph nodes under the forehead clinically have the following points: First, acute soft tissue infection, such as skin surface bacteria along the skin breach into the tissue space, can form a local abscess and cause the swelling of the lymph nodes under the forehead. At this time, active anti-infection treatment is needed, and patients with abscess formation need to perform abscess incision and drainage, and the enlarged lymph nodes can be relieved more quickly. For patients with malignant tumor of nasopharynx and malignant tumor of esophagus, the tumor cells may invade into the infra-frontal lymph nodes and cause enlargement and hyperplasia. At this time, the specific location of the tumor can be clarified through CT examination, primary tumor resection can be carried out as soon as possible, and local radiotherapy and systemic chemotherapy can be given after the operation, which can often achieve better therapeutic effect. Third, patients with acute suppurative tonsillitis may have enlarged and hyperplastic lymph nodes under the forehead because of local inflammation and infection, if necessary, they need to perform surgery to remove tonsils to strengthen the anti-infection treatment, so as to reduce the symptoms of enlarged lymph nodes under the forehead.