For the last 3 months I have been feeling a blood rush in my thighs while riding my bike and sitting in the office. While sitting at home and other places I don't feel this rush. No swelling in any part of the body. Mild aches at times in the buttock and groin area. At the start it started with low back pain, but now relieved that. Unable to sit in the office for a longer period feels discomfort/mild burning sensation at both sides of the hip.