Hello, one of my close friend is suffering from a severe pain felt at the lower back at the hip level and when it gets severe it radiates towards lower portion of the abdomen. she is been having this pain after she went to a yoga class where forward stretches was more focused upon on that particular day. since then, she gets these pain often. She still practices yoga and surprisingly complete forward bend from standing position as well as the lateral bends from standing position is when her pain aggravates. I noticed that when these muscles are stretched she goes into pain where as back bends, twisting postures etc don't have any effects on the pain scale. this means, when the area is contracted pain seems not to be felt. when she consulted an orthopedic doctor, he diagnosed her spine and hip bone to be perfect but asked her to continue with yoga within her limit for movement. A family physician, said it might be due to gas trouble. Can you suggest what could possibly be wrong with my friend ? oh btw, she is around 50 yrs, have BP - 140/86 mmHg and obese.