Ankylosing Spondylitis (AS) is a chronic inflammatory condition that mainly affects the spine and sacroiliac joints, where the spine meets the pelvis. This disease causes pain, stiffness, and swelling in these areas and can sometimes involve other joints like the hips, knees, or shoulders. In severe cases, it can lead to fusion of the vertebrae, resulting in a rigid and inflexible spi... https://www.uwayhealth.com/ankylosing-spondylitis/