Neck has a lymph node like soybean size can slide may be normal physiological phenomenon, infection or malignant tumors and so on. 1. Normal physiological phenomenon: in the neck, especially in the back of the ear, because the subcutaneous fat layer is very thin, so the lymph nodes can generally be touched, about the size of a soybean, with the hand to push the time to be able to slide back and forth, pressure is not accompanied by pain, the surface is not red, swollen and inflammation and other cases, this may be normal, pay attention to observation. 2. Infection: soft tissue infection in the neck will show the reactive hyperplasia and enlargement of regional lymph nodes, so the lymph nodes will be touched and enlarged, accompanied by tenderness and swelling, and the surface of the skin will be red, and systematic anti-infection treatment should be carried out. 3. Caused by malignant tumor: the most common one is thyroid cancer, which is easy to have neck lymph node metastasis. Generally, the metastatic lymph nodes can be slid in the early stage, and with the progress of the disease, the lymph nodes are more fixed and difficult to be slid, so early surgical treatment is needed. For unexplained lymph node disease, it is necessary to exclude the possibility of lymph node tumor or certain diseases. If it is difficult to determine the nature of the disease, it is recommended that the patient can have a puncture biopsy to confirm the diagnosis.