Normal lymph nodes on the neck are usually no more than 0.5CM, if the diameter is more than 1CM, it is considered that the lymph nodes are diseased, and you need to go to the hospital as soon as possible for further examination to clarify the cause of the disease and treatment. Lymph nodes in the neck are usually small and cannot be touched. The fat tissue behind the ear is thin, and normal lymph nodes can be touched, about the size of a soybean, with clear boundaries, soft texture, no pain when pressed, and good mobility, while lymph nodes in other parts of the neck cannot be touched. If the lymph nodes can be touched, the lymph nodes may be enlarged due to infection, tumor and other common factors. If the lymph node enlargement is caused by infection, it is often accompanied by pain, redness on the surface, or even the formation of abscess. After anti-infection treatment, the lymph node will gradually become softer and disappear. When lymphoma or other tumors metastasize to the lymph nodes in the neck, it can also cause swelling of the lymph nodes in the neck without pain. The most common one is metastasis of thyroid tumors, which requires radical surgery for thyroid tumors to control the condition and relieve the symptoms. If the patient has persistently enlarged lymph nodes, accompanied by other symptoms, the possibility of other diseases cannot be ruled out, and it is recommended to go to the regular hospital for examination as soon as possible to clarify the cause of the disease and control the condition.