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.

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.

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 ...

Spasticity is a condition that affects your muscles, making them tight or stiff. This can impact your ability to perform daily activities, such as walking, eating, and talking. The condition may also ...

Dehydration and electrolyte imbalances can cause leg cramps. Pregnancy, certain conditions, and medications can increase your risk of leg cramps. You can stretch and stay hydrated to prevent or ...

‌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 ...

SAN ANTONIO, Feb. 4, 2026 /PRNewswire/ -- For many stroke survivors, recovery is derailed by painful muscle stiffness and involuntary spasms that limit movement, independence and quality of life.

Bladder spasms cause you to suddenly feel like you need to run to the bathroom and empty your bladder. They occur when the muscles in your bladder contract rapidly. Bladder spasms are common for ...

Living with multiple sclerosis (MS) often means dealing with different kinds of pain — some caused by damage to nerves, some by muscle stiffness or spasms, and some related to changes in how the body ...

Spastic diplegia cerebral palsy (SDCP) is a form of cerebral palsy that causes muscle stiffness and spasms in a person’s legs and, sometimes, arms. This is due to damage to the motor cortex of the ...