Depending on the cause of the sacroiliac joint pain, the age and gender of the susceptible population varies. For example, pregnant women are prone to sacroiliac joint pain due to hormonal changes and an enlarged uterus, which leads to ligament relaxation and a certain degree of osteoporosis in the sacroiliac joint; men and young adults between the ages of 15 and 30 are prone to ankylosing spondylitis and often suffer from sacroiliac joint pain.