Flatback syndrome occurs when the lower spine loses its curve and becomes straight. A flat back cause symptoms such as persistent back pain and an inability to stand upright. The human spine has ...

Learn more about Piriformis syndrome, which is a neuromuscular disorder due to a compression of the sciatic nerve. Understand its causes, symptoms, and treatment methods.

If it appears that piriformis syndrome is causing your symptoms, ... One simple exercise you can try is to lie flat on your back with both knees bent.