Muscle twitches are fine movements of a small area of muscle.
Muscle twitching is caused by minor muscle contractions in the area, or uncontrollable twitching of a muscle group that is served by a single motor nerve fiber.
Muscle twitches are minor and often go unnoticed. Some are common and normal. Others are signs of a nervous system disorder.
Nervous system conditions that can cause muscle twitching:
Symptoms that suggest a nervous system disorder include:
There is usually no treatment necessary for benign muscle twitching.
Call your health care provider if you have long-term or persistent muscle twitches.
Your health care provider will take a medical history and perform a physical examination.
Medical history questions may include:
Diagnostic tests vary depending on the suspected cause. Tests may include:
Muscle fasciculation; Fasciculations of muscle
Barohn RJ. Muscle diseases. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007: chap 447.
Reviewed by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Luc Jasmin, MD, PhD, Department of Neurosurgery at Cedars-Sinai Medical Center, Los Angeles, and Department of Anatomy at UCSF, San Francisco, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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