AS is a type of arthritis that causes inflammation in the spine and big joints. This inflammation makes the spine stiff and can cause pain. Over time, it might lead to bones in the spine fusing together, which can limit movement.
AS is a type of arthritis that causes inflammation in the spine and big joints. This inflammation makes the spine stiff and can cause pain. Over time, it might lead to bones in the spine fusing together, which can limit movement.