Arm muscle pain may be caused by physiological factors such as heavy physical labor or prolonged exercise, and may also be caused by trauma, cervical spondylosis and other pathological factors. 1. Physiological factors: due to heavy physical labor or prolonged exercise, the body produces too many metabolic products, lactic acid accumulation, can cause the symptoms of arm muscle pain, is a normal physiological phenomenon, adequate rest or local hot compresses can be relieved. 2. Trauma: such as violence or fall, can lead to upper limb muscle strain, ligament injury, etc., can appear arm pain, accompanied by localized swelling, upper limb activity disorder and other symptoms. 3. Cervical spondylosis: cervical disc herniation can lead to compression of the spinal cord and nerve roots, causing nerve compression symptoms, pain and numbness in the upper limbs of the neck, accompanied by neck and shoulder pain. There are many other causes of arm muscle pain, such as humeral epicondylitis, etc. It is recommended that patients go to the hospital as soon as possible, after clarifying the cause of the disease for standardized treatment, so as not to delay the condition.