Add Yahoo as a preferred source to see more of our stories on Google. Many of us have felt a muscle in some part of our body suddenly and involuntarily tighten, causing a twitch or even severe cramp.

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 ...

We've all been there before. Running along the basketball court or swimming across the pool, when, all of a sudden, we experience a sharp pain in our foot or leg. Muscle cramps are common, affect ...

You're relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it's a muscle in your arm, your leg, or your foot that begins to spasm—sometimes for a few seconds, sometimes for ...

Cerebral palsy can cause muscle spasms and many other hypertonic symptoms. The symptoms can be treated in a variety of ways, often starting with physical therapy. Cerebral palsy (CP) is a group of ...

Causes of back spasms range from poor posture or minor muscle strains to underlying health conditions like osteoarthritis. Lifestyle changes and home remedies can help to relieve symptoms, along with ...

Muscle spasms can be a source of considerable pain in many people with fibromyalgia and chronic fatigue syndrome. Muscles clench and just won't relax, sometimes in spite of multiple treatments. These ...

The infectious disease can cause muscle spasms strong enough to fracture bones. It's fully preventable, but vaccination rates are slipping.

Even though it can cause excruciating and debilitating muscle spasms, most people had never heard of stiff person syndrome until late last year, when singer Celine Dion announced her diagnosis. This ...