Add Yahoo as a preferred source to see more of our stories on Google. A muscle spasm, also known as a cramp, twitch or charley horse, is the sudden and involuntary forced contraction of a muscle.

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.

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 ...

People sometimes refer to neurological conditions that cause dystonia (involuntary movement) as “dystonias.” There are many types, and they can affect people of different ages and in different ways.

Céline Dion revealed that she's been diagnosed with stiff person syndrome on Thursday. Stiff person syndrome is a very rare neurological disorder that causes progressive muscle stiffness and painful ...

Stiff person syndrome (also known as SPS, Moersch-Woltman syndrome, and stiff man syndrome) is a very rare condition that can cause your muscles to become rigid or spasm. This is a progressive ...

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 ...