Wide hip bones on both sides can be caused by normal bony prominence, poor posture, synovitis of the greater trochanter and muscle atrophy. 1. Normal bony prominence: the hip bone can be wider due to congenital factors, the hip bone itself on both sides of the greater trochanter structure of the femur, is a normal bony prominence, can be touched on both sides. It is normal bony protrusion, which can be touched bilaterally. It does not need to be treated. 2. Poor posture: Long-term poor posture of the hip, such as crossing the legs and twisting the hips excessively when walking, can cause the position of the greater trochanter to change, resulting in excessive protrusion. 3. Synovitis of the greater trochanter: due to long-term friction, extrusion or stimulation by cold and other factors, can cause inflammation of the synovial membrane of the greater trochanter, the inflammation can stimulate the localization and lead to protruding manifestations. 4. Muscle atrophy: due to the lack of exercise for a long time, malnutrition and other factors, can lead to atrophy of the muscles around the hip bone, so that the bony protrusion of the greater trochanter of the femur is more obvious. When the hip bone width on both sides of the bone protrudes, you should consult a doctor in time, under the guidance of a specialist to actively carry out the appropriate treatment, which will help to alleviate the uncomfortable symptoms as soon as possible.