What is ankylosing spondylitis?
Ankylosing Spondylitis (AS) is a type of chronic inflammatory arthritis that affects spine and the sacroiliac joints. Chronic inflammation in these areas causes pain and stiffness in and around the spine. AS affects men three times more often than women.The first symptoms of AS typically start in late adolescence. AS can cause inflammation or injury to other joints away from the spine, as well as to other organs, such as the eyes, heart, and lungs. AS can cause inflammation of the tendons surrounding the joints (enthesitis). Some of the common spots for enthesitis are the back of the heels (Achilles tendonitis), and underneath the bottoms of the feet (plantar fasciitis).