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Ankylosing Spondylitis (AS) is a type of progressive arthritis that leads to chronic inflammation of the spine and sacroiliac joints. It can also affect other joints and organs in the body, such as the eyes, lungs, kidneys, shoulders, knees, hips, heart, and ankles.
Ankylosing spondylitis (AS) is a lifelong condition that causes the joints of your spine to hurt and swell. About 350,000 adults in the United States have it. Take a few minutes to learn more about ankylosing spondylitis in the slideshow below.