Neck lymph nodes belong to superficial lymph nodes, superficial lymph nodes exist in the neck, armpits, groin and other parts of the body, generally superficial lymph nodes can be felt, deep lymph nodes can not be felt, normal superficial lymph nodes serous or elliptical, generally within 0.5cm, smooth surface, clear boundaries, no pressure and pain. If the disease causes lymph node enlargement, such as pneumonia, tonsillitis caused by cervical lymph node enlargement, palpable cervical lymph node enlargement, there can also be pressure and pain. There is also the possibility that a lung tumor has caused lymph node metastasis. Because lung metastasis to cervical lymph nodes and supraclavicular lymph nodes is very likely, it may be caused by tumor. There is also the possibility of breast tumor, because many breast tumors rely on lymph nodes to metastasize, so there is the possibility that breast metastases cause axillary lymph node enlargement. If the lymph nodes are very large, hard and with poor mobility, you should go to the hospital and do some relevant examinations to rule out the possibility.