What is Ankylosing Spondylitis?

Ankylosing spondylitis (AS) is a type of arthritis that primarily affects the spine, causing inflammation, pain, and stiffness. It is a chronic condition that can lead to the fusion of the vertebrae, resulting in a rigid spine. AS can also affect other joints, as well as the eyes, heart, and lungs. This condition typically starts in the sacroiliac joints, where the spine connects to the pelvis, and gradually progresses up the spine.

AS is more common in men than in women, and usually begins in early adulthood. The exact cause of AS is unknown, but it is believed to be related to genetic and environmental factors.