The muscles in your arms that keep throbbing can be treated with physical therapy options, such as hot compresses, which can be applied to the trembling muscles with a hot towel or warm water bag once a day for about 10 minutes, and the symptoms can be relieved. You can also massage the trembling muscles with soft, gentle, continuous and strong movements for about 15 minutes each time, twice a day, and the symptoms can be relieved. If the symptoms are more frequent and the effect of hot compresses and local rubbing is not good, you can choose to go to the hospital for further consultation and stimulate the throbbing muscles through acupuncture therapy and electroacupuncture therapy, both of which are very effective in stimulating the muscles, and you can choose to go to a regular Chinese medicine hospital for further consultation. Muscle tremors are caused by tremor of the muscle bundle, the cause of which is unknown, as long as it is treated symptomatically.