A muscle spasm — also known as a charley horse, muscle cramp or twitch — is a sudden, involuntary movement in one or more muscles. Common causes include stress, exercise, or dehydration, but nerve ...

Dear K.O.S.: That’s an excellent question. Vasospastic angina, also called variant angina or Prinzmetal angina, is caused by spasmodic constriction of the artery, often with blockages, but sometimes ...

‌Hemifacial spasm is a disorder of the nerves and muscles that causes nonpainful involuntary twitching on one side of the face. Many people refer to hemifacial spasms as lip muscle spasms. Hemifacial ...

A cricopharyngeal spasm occurs when the cricopharyngeus muscle in the throat is overly or excessively contracted. Remedies can include coping techniques at home and medical treatments for the ...

Background A 28-year-old woman presented to hospital after an episode of severe lower back spasms that occurred during a stressful family gathering. She had a history of progressive difficulty bending ...