The femoral head appears sore and swollen, and it is difficult to touch the femoral head in clinical practice. The soreness and swelling of the femoral head mainly refers to the soreness and swelling of the hip joint. The common causes are as follows: 1. Synovitis of the hip joint, due to the presence of aseptic inflammation of the synovial membrane, resulting in local hyperplasia, hypertrophy, and inflammatory exudation, resulting in fluid accumulation in the joint cavity and inflammatory reaction, which will lead to soreness and uncomfortable feeling. 2. Ischemic necrosis seen in the femoral head, due to the Poor blood circulation and abnormal bone metabolism will lead to sclerosis of the bone. The hip joint is an important weight-bearing joint of the lower limb, and it also plays a heavy role in walking and sports, so it often causes strain and injury, resulting in localized soreness and pain.