Most of the arm pain is caused by prolonged activity or strenuous exercise, but it can also be due to muscle spasm. The treatment should be chosen according to the different causes, and the specific methods are physical therapy, medication, and surgical treatment. 1. Prolonged exercise leading to lactic acid buildup: If the arm pain is caused by lactic acid buildup due to prolonged exercise or strenuous exercise, you should reduce the activity of the arm and keep the muscle relaxed. After most of the lactic acid is absorbed, the symptoms of arm pain will disappear. If the pain is relatively strong, you can carry out physical therapy such as localized hot compresses, baking lamp or electromagnetic physical therapy and other methods of relief. 2. Muscle spasms: If muscle spasms cause arm pain, you can take medication on the basis of physical therapy. In the pain in the parts of the pain stick pain cream or spray Yunnan Baiyao spray, can temporarily relieve pain; can also take ibuprofen and other non-steroidal anti-inflammatory drugs anti-inflammatory analgesic. It is recommended that patients with unbearable arm pain should seek medical examination as soon as possible, and according to the specific diagnosis, follow the doctor’s advice to take appropriate treatment measures.