Axillary lymph nodes are visible, which means that there are visible swollen lymph nodes in the armpit. There are many causes of swollen lymph nodes, such as bacterial infection, viral infection, tuberculosis infection, autoimmune system disease, blood system disease, allergic factors, and even lymph node metastasis from malignant tumors. It is necessary to go to the hospital to improve the relevant tests, such as blood routine, C-reactive protein, tuberculin test, and sometimes tumor markers. Some patients need to have lymph node puncture biopsy or excisional biopsy to clarify the nature of the disease. If the infection is considered to be the cause, active medication is needed, as well as increased water intake and rest time. If it is considered to be caused by malignant tumor, active search for the primary tumor, radical resection of the tumor, followed by chemotherapy, targeted drug therapy, Chinese medicine treatment, etc.