For patients with swelling and pain in the ankle joint. First, it can be caused by trauma, especially if the trauma has caused wear and tear of the cartilage or ligament damage in the ankle joint, which can lead to significant swelling, pain and limited movement of the ankle joint. Secondly, in patients with degeneration, osteophytes and osteoarthritis of the ankle joint, when moving around, the enlarged bone will stimulate the surrounding soft tissues and cause obvious swelling and pain in the ankle joint, and the pain will be significantly aggravated when weight-bearing activities. Thirdly, in patients with traumatic arthritis of the ankle joint due to incomplete treatment after trauma, there will be obvious swelling and pain in the ankle joint when moving later.