Cross-legged sitting one leg pressure can not go down big hip pain is also known as hip joint pain, may be the femoral head necrosis, may also be hip arthritis, hip synovitis, etc.. 1. Necrosis of the femoral head: necrosis of the femoral head will cause necrosis of the joint surface and joint cavity and other joint tissue cells, resulting in joints can not be normal pulling, shifting and other normal physiological activities, which will appear in the performance of hip pain. 2. Hip arthritis: refers to inflammatory lesions of joints caused by inflammation, infection, trauma or other factors, the main clinical features are redness, swelling, heat, pain and dysfunction of the joints, which will lead to the manifestation of hip joint pain. 3. Hip synovitis: synovitis is mainly characterized by swelling and pain in the hip joint. If the condition continues to progress, it can lead to joint adhesion, limitation of hip joint activities and pain. Cross-legged sitting a leg pressure can not go down the big hip pain, there may be other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.