Symptoms of sacroiliac arthritis include pain, stiffness, and limitation of movement. 1. Pain: mainly pain in the lower back and buttocks, mainly soreness and swelling, occasionally pain in the thigh and groin area. Pain may be induced by prolonged standing, strenuous activities and exposure to cold. 2. Stiffness: Some patients may experience stiffness in the lumbosacral region when they wake up in the morning, which usually lasts less than 30 minutes and is relieved after activities. 3. Restriction of activities: long-term sacroiliac arthritis may cause joint contracture and mechanical atresia, which may result in limitation of lumbosacral activities. Sacroiliac arthritis should be consulted in time, improve the relevant examination to clarify the cause of the disease, and be treated under the guidance of the doctor.