Right arm muscle throbbing consider physiological factors, pathological factors, such as muscle strain, calcium deficiency, cervical spondylosis, epilepsy and other reasons. 1. Physiological factors: for example, frequent inactivity can cause the muscles to be in a position for too long to appear muscle throbbing, generally no pain. 2. Muscle strain: often use the arm too much can cause chronic strain, muscle spasm, muscle throbbing, muscle pain. 3. Calcium deficiency: muscle excitability rises after calcium deficiency, resulting in muscle twitching and non-stop throbbing. 4. Cervical spondylosis: when the nucleus pulposus compresses the nerves, it can radiate to arm pain and numbness. Some will have arm muscle throbbing. 5. Epilepsy: when a partial seizure occurs, a muscle will keep jumping, which can be relieved on its own. It is recommended to go to the hospital for examination of right arm muscle throbbing, and further treatment after clear diagnosis.