A fall, car accident, or sports injury can damage the SI joint or surrounding structures, leading to instability and pain.
Hormonal changes and the physical stress of carrying and delivering a baby can affect the SI joint. The hormone relaxin increases joint laxity, which can lead to instability.
Activities that involve repetitive motions, heavy lifting, or prolonged sitting can strain the SI joint and surrounding muscles, leading to pain and instability.
Osteoarthritis or inflammatory arthritis can affect the SI joint, causing pain and stiffness. Inflammatory conditions like ankylosing spondylitis can also impact the SI joint.
Abnormal gait, leg length discrepancies, or poor posture can place additional stress on the SI joint, leading to pain and instability.
Although less common, infections in the SI joint can cause inflammation and pain.
Over time, wear and tear on the SI joint can lead to degeneration of the cartilage and surrounding tissues, causing pain and instability.
