My left tricep muscle started twitching 2 month ago. it would happen often through out the day. i took calcium and magnesium seem to help. i stop taking them daily about 1 week ago. it started twitching again last 2 days. same tricep no other muscle.

Muscle Twitching: Muscle twitching is caused by minor muscle contractions in the area. Causes include lack of nutrients in the diet, medication side effects, lack of sleep, too much caffeine/exercise/stress, medical conditions that cause metabolic disorders, including low potassium, kidney disease, and uremia. If Calcium /Magnesium supplement helps, keep taking it. if symptoms continue see a DR.