There are many causes of hip joint pain with every step of the foot, such as synovitis of the hip joint, necrosis of the femoral head, fracture of the neck of the femur and so on. 1. Hip synovitis: synovium is an important structure in the joint capsule, which has the function of secreting synovial fluid, lubricating and protecting the joint capsule. However, long-term incorrect posture will lead to aseptic inflammation of the synovial membrane in the hip joint, which will lead to excessive secretion of synovial fluid and irritate the hip joint, causing pain and discomfort. 2. Necrosis of the femoral head: When the hip joint is hit by external forces during activities, the femoral head of the hip joint will be damaged and the blood circulation will become poor, which will easily lead to necrosis of the femoral head and cause hip pain. 3. Femoral neck fracture: Slight external force on osteoporosis can cause femoral neck fracture, causing pain and swelling of the hip joint and affecting the walking function of the human body. If there is a symptom of hip pain in every step, we should pay attention to it and go to the orthopedic department of the hospital in time.