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Summary
Ankylosing spondylitis is a type of arthritis of the spine. It causes inflammation between your vertebrae, which are the bones that make up your spine, and in the joints between your spine and pelvis. In some people, it can affect other joints.
AS is more common and more severe in men. It often runs in families. The cause is unknown, but it is likely that both genes and factors in the environment play a role.
Early symptoms of AS include back pain and stiffness. These problems often start in late adolescence or early adulthood. Over time, AS can fuse your vertebrae together, limiting movement. Some people have symptoms that come and go. Others have severe, ongoing pain.
A diagnosis of AS is based on your medical history and a physical examination. You may also have imaging or blood tests.
AS has no cure, but medicines can relieve symptoms and may keep the disease from getting worse. Eating a healthy diet, not smoking, and exercising can also help. In rare cases, you may need surgery to straighten the spine.
NIH: National Institute of Arthritis and Musculoskeletal and Skin Disease
Diagnosis and Tests
- Diagnosis of Ankylosing Spondylitis (Spondylitis Association of America)
Treatments and Therapies
- Integrative Medicine (Spondylitis Association of America)
- NSAIDs (Nonsteroidal Anti-Inflammatory Drugs) (American College of Rheumatology) Also in Spanish
Living With
- Spondyloarthritis and Exercise (Spondylitis Association of America)
Genetics
- Ankylosing spondylitis: MedlinePlus Genetics (National Library of Medicine)
Clinical Trials
- ClinicalTrials.gov: Spondylitis, Ankylosing (National Institutes of Health)
Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Comparing outcomes for single-segment vertebral column decancellation performed at different vertebras...
- Article: Efficacy and safety of upadacitinib in patients with active ankylosing spondylitis...
- Article: Decreases in lung volume and lung height among ankylosing spondylitis patients...
- Ankylosing Spondylitis -- see more articles
Find an Expert
- Find a Rheumatologist (American College of Rheumatology)
- National Institute of Arthritis and Musculoskeletal and Skin Diseases Also in Spanish
Patient Handouts
- Ankylosing spondylitis (Medical Encyclopedia) Also in Spanish
- HLA-B27 antigen (Medical Encyclopedia) Also in Spanish