The pressure pain in the breast near the armpit may be skin pain, such as trauma, folliculitis, etc., or it may be mastalgia pain, lymph node swelling pain, etc. There may also be nerve causes, such as intercostal neuralgia, etc. After the cause is clearly identified, the corresponding treatment can be carried out to eliminate the pain: 1. Skin pain: for example, trauma to the breast near the armpit will cause traumatic pain in the corresponding area, and the pain can be eliminated after a period of recuperation, or skin diseases in the breast near the armpit, such as folliculitis, boils, etc., the infection causes inflammation, and the inflammatory reaction will cause pain, which can be mild without treatment or local application of antibiotic ointment If the symptoms persist and are severe, patients need to seek medical attention and follow medical advice to systematically apply antibiotics and, if necessary, incision and drainage; 2. Breast pain: breast pain is the main symptom, including the parametrium at the armpit, and can develop in both men and women. It is mostly seen in female patients clinically, and generally recurs with changes in estrogen levels during the menstrual cycle and mental stress. Relaxation and adequate rest can reduce the pain. If the pain is severe, tamoxifen can be used as prescribed by the doctor to relieve the pain; 3. Swollen lymph nodes: swollen lymph nodes can be caused by inflammation, tuberculosis, malignant tumors, etc., resulting in localized enlargement of lymph nodes and pain in the breast near the armpit, which aggravates the pain when pressed. The primary cause should be treated, and the swelling and pain of lymph nodes will recover after the cause is eliminated; 4. Intercostal neuralgia: the pain is distributed in patches, and can occur in the breast near the armpit, and the attack is aggravated when coughing or deep breathing, because its cause is not clear, the treatment mainly chooses analgesic drugs, such as carbamazepine and phenytoin sodium.