Muscle spasms or cramps are fairly common and most frequently occur in the leg muscles. But any muscles, including your back, hands, feet, or toes can spasm. Muscle spasms can last anywhere from a ...

Takeaways. Piriformis syndrome happens when your piriformis muscle presses on your sciatic nerve. This causes pain, tingling, and numbness in your lower back, hip, and leg.

Learn more about the causes, risk factors, diagnosis, treatment, & prevention of Charley horses - cramps caused by muscle spasms, involuntary contractions of one or more muscles ...