Left arm tendon pain may be related to trauma, localized strain or other orthopedic diseases, and can be treated in the emergency department, orthopedic department, pain department or general surgery department. 1. Emergency medicine: when the left arm tendon pain manifests, the first thing to consider is trauma, there is a clear history of trauma, local skin can be seen broken or bleeding, at this time, should go to the emergency department for treatment in a timely manner. 2. Orthopedics: common such as local tissue chronic strain injury or tenosynovitis, etc., can appear in the left arm tendon pain symptoms, at this time you can go to the orthopedic department for consultation. 3. Pain Medicine: If there are obvious symptoms of tendon pain in the left arm, you can also choose to go to the Pain Medicine Clinic for treatment. 4. General Surgery: When the symptoms of left arm tendon pain appear, it may also be related to lipoma, which is a kind of common soft tissue benign tumor. If the size of the lipoma is large, you need to go to General Surgery Department in time for diagnosis and treatment, and if necessary, surgery is needed. If you have symptoms of left arm tendon pain, you need to go to the relevant department for consultation in time.