Axillary lymph 16mm*4mm is not normal, larger than normal lymph nodes, can be seen in infection, cancer metastasis, lymphoma and other diseases. Under normal circumstances, the size of axillary lymph nodes should be between 2mm~5mm, and the texture is soft usually will not be touched, and there will be no pressure and pain and other sensations, and the size of the axillary lymph nodes 16mm * 4mm has exceeded the normal size, can be seen in the reactive enlargement after suffering from certain diseases. 1. For example, infections can be caused by respiratory tract infections, pharyngitis and other diseases, usually with the manifestation of the primary disease, through the treatment of the primary disease, such as penicillin and other anti-inflammatory treatments will be reduced to normal. 2. It can also be seen in cancer metastasis, such as common breast cancer, which usually has the primary manifestation of breast cancer, such as painless nodules in the breast, mainly through surgical treatment. 3. Lymphoma, which can be caused by viral infection, etc., with low-grade fever, enlarged lymph nodes and other manifestations, mainly through chemotherapy. Axillary lymph 16mm*4mm should seek medical treatment in time to receive professional diagnosis and treatment.