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 ...

‌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 ...

DEAR DR. ROACH: In 2021, I drove to the hospital with chest and back pain. I was told that I needed an emergency surgery to remove my gallbladder. During the procedure, I suffered a heart rhythm ...