An axillary lymph node 12 x 6 mm is a pathology of enlarged lymph nodes and is not normal. It may be due to lymphadenitis, lymph node cancer or blood diseases. 1. Lymphadenitis: Lymphadenitis is usually a benign lymph node lesion caused by infection with virus or bacteria. Patients will have painful and enlarged lymph nodes, which will cause localized swelling and pain, and some patients will also have fever. 2. Lymph node cancer: the cause of lymph node cancer is still unclear, and the symptoms of this disease are usually not obvious in the early stage, and some patients will have enlarged lymph nodes in axilla, groin, neck and other parts of the body. Some patients may have swollen lymph nodes in axilla, groin, neck and other parts of the body. Sometimes patients may also have symptoms such as fatigue and severe sweating. 3. Blood diseases: Some blood diseases can also cause symptoms of swollen lymph nodes, such as leukemia. When leukemia cells infiltrate the lymph nodes in the armpit, it will trigger the symptoms of swollen lymph nodes in the armpit. Swollen axillary lymph nodes are also seen in other causes, should consult a doctor in time, under the guidance of a professional doctor standardized treatment, so as to avoid delaying the condition.