What causes muscle spasms in the arms?
Muscle spasms can occur for a number of reasons. The most common cause of muscle spasms is muscle fatigue, or overuse of a particular muscle, according to MedlinePlus. Sometimes a muscle spasm can feel like the muscle is hard, bulging, twitching or tight. You can try to stretch your arm to relieve a muscle spasm; although, it may be painful at first. If the cramping sensation becomes persistent, seek medical help right away, as it could be a sign of a more serious condition, such as multiple sclerosis.
