If bilateral axillary pain occurs at the same time, consider the following points: 1. Sports injury, strain of the shoulder joint or strain of the pectoral muscle caused by strenuous exercise, causing pain under the axilla. 2. Infection of the axillary lymph nodes, usually the body is invaded by bacteria or viruses, resulting in pain in the lymph nodes. It is recommended to go to the hospital for routine blood tests, usually combined with elevated blood count or elevated lymphocytes. Depending on the source of the infection, anti-inflammatory treatment can be administered with different medications. For infectious pain, if the lymph nodes are attacked, there will be swelling of the lymph nodes and systemic manifestations such as increased body temperature and chills. In case of bilateral pain under the armpits in women, it is important to analyze whether it is related to menstruation. It may be caused by bilateral mastopexy, or it may be caused by parametrial hyperplasia in bilateral armpits in women during pregnancy or lactation, and it is recommended to go to general surgery or breast surgery for treatment.