The irritation of the sciatic nerve causes hip and lower back pain, which spreads downwards to the limbs and feet. It is estimated that 4 out of 10 people will develop sciatica or irritation of this nerve at some point in life. This nerve is located deep in the buttock, beneath the piriformis muscle, so its constriction and swelling can also cause sciatica pain and irritations.
The piriformis muscle connects the top of the femur to the spine, and it’s the main one that supports the outward movement of the hip, upper leg, and foot. Yet, the sciatic nerve can sometimes pass through this muscle and thus cause sciatica symptoms, or known as piriformis syndrome, characterized by pain in the lower back and hips, poor movement, and balance. Read the full story here 
