In most cases, twitches are caused by minor nerve irritation rather than a serious disease. Frequent lifestyle triggers include: Muscle twitching: MedlinePlus Medical Encyclopedia
Muscle twitching, medically known as , involves small, involuntary contractions of a muscle group served by a single motor nerve fiber . While these tiny "jumps" under the skin can be unsettling, they are extremely common—affecting roughly 70% of people—and are usually harmless. Common Triggers twitching