Periosteal adhesion generally refers to the adhesion between the bone and the surrounding soft tissues, which may be related to aseptic inflammation, joint infection, trauma and so on. 1. Aseptic inflammation: generally because of the synovial membrane of the joint capsule becomes congested and inflamed, the inflammatory factors will gather in large quantities, causing the adhesion of the surrounding soft tissues, resulting in the thickening of the joint capsule, which leads to the periosteal adhesion. Common diseases include frozen shoulder, rheumatoid arthritis, osteomalacia and so on. 2. Joint infection: when there is a fracture in the joint area, the wound range is large and the joint cavity has more blood seepage, it is easy for joint infection to occur, and if timely and reasonable treatment and rehabilitation training are not carried out, periosteal adhesion may occur. 3. Trauma: When the joint is traumatized or bleeding, it will cause hematoma mechanization, so periosteal adhesion will also occur after trauma. If the phenomenon of periosteal adhesion occurs, it is recommended that the patient go to the hospital in time to improve the examination, to clarify the cause of the disease and then carry out targeted treatment.