Types

Ankylosing Spondylitis

Choose a preferred language

Ankylosing spondylitis, or “AS,” is a form of arthritis that causes pain and stiffness of the spine. The word "ankylosing" means rigid. In AS, the bones of the spine become very rigid and can fuse together. The symptoms usually begin in the lower back and may also affect the hips and the rest of the spine. Other joints are affected less frequently.

© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

Make an Appointment

Make an Appointment

Find a Doctor

Find a Doctor

Find a Location

Find a Location

Related Services

Orthopedics Center

Related Articles
Read article
Orthopedics
Shoulder (AC) Arthritis

Osteoarthritis of the AC joint in the shoulder is common in middle-aged or older adults. This video explains how this condition develops and how you can minimize its effects.

Read article
Orthopedics
Cervical Arthritis

Cervical arthritis means arthritis of the neck bones. Your neck has 7 vertebrae, and cushiony disks sit between the vertebrae. Over time or with injury, the disks can have problems and may bulge outward or get thinner.

Read article
Orthopedics
Arthritis of the Spine

Arthritis in the lower back and pelvic area can cause pain and loss of motion. See how this arthritis develops, who's at risk, and what treatments can help.

Read article
Orthopedics
Osteoarthritis

Osteoarthritis most commonly affects the knees, hips, spine, and other weight-bearing joints in the body. Sometimes called the "wear and tear" arthritis, advancing age is a risk factor, but so are obesity and severe injury to the joint. This video discusses the symptoms, treatment, and steps you can take to minimize pain from osteoarthritis.