First, the ankle joint may be irritated by cold, moisture or sudden temperature changes, which may cause ankle joint pain and discomfort. Second, it may be due to injury to the ankle joint. Mild wear and tear or sprain of the ankle joint during normal walking or sports may also cause soreness and swelling of the ankle joint. Synovitis in the ankle joint may also occur in patients with synovitis. Early synovitis should not invade the bone tissue of the ankle joint, so the early symptoms are mainly soreness and swelling of the joint. Finally, there may be arthritis in the ankle joint, which may be caused by injury, strain, or rheumatism, and the early symptoms are just soreness and swelling of the ankle joint. In addition to the above reasons, it may also be a lumbar spine disease that causes nerve compression in the lower extremities, which can also cause soreness and swelling of the innervated joints.