A back spasm happens when the muscles in your back contract involuntarily, causing pain, stiffness, and tightness. They can ...

In addition to pain in the lower back, symptoms may include: a limited range of motion muscle spasms stiffness pain that may worsen when getting out of bed Heavy lifting, twisting, or a fall can ...

Here's why this muscle deserves more attention—and how to strengthen it. Lower back pain is often blamed on posture or pulled muscles—but the real cause may be deeper. Experts point to a deep ...