It can be uncomfortable and painful at times. Spasticity occurs when the nerve impulses that control muscle movement are interrupted or damaged. A variety of conditions can cause this, including: ...

Medically reviewed by Jennifer Steinhoff, MD Key Takeaways Muscle twitching is often caused by stress or a lack of sleep and ...

Benign fasciculation syndrome involves involuntary twitching in your eyes, arms, legs, or other body parts. It’s usually not a cause for concern, but it’s worth discussing with your healthcare ...