Spondyloarthritis is a group of inflammatory diseases that mainly affect the joints and the areas where tendons and ligaments attach to bones. It most often involves the spine, but it can also affect other joints and organs in the body.
This condition can cause ongoing pain and stiffness, especially in the back, and may also lead to swelling in other joints or symptoms outside the joints, such as eye inflammation or skin changes. The severity can range from mild to more serious forms depending on the type and how the disease progresses.
Treatment focuses on reducing inflammation, improving mobility, and preventing long-term damage. Early diagnosis and proper management can help control symptoms and improve overall quality of life.
Main symptoms
Spondyloarthritis can affect different parts of the body, but it most commonly causes symptoms related to inflammation in the joints and surrounding tissues.
Common symptoms include:
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Chronic back pain that improves with movement and worsens with rest
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Morning stiffness lasting more than 30 minutes
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Pain and swelling in joints such as the hips, knees, or ankles
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Pain at tendon attachment sites, such as the heels
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Swelling of fingers or toes
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Eye inflammation, causing redness and pain
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Skin changes, such as psoriasis
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Digestive symptoms in some cases
Symptoms may vary depending on the type of spondyloarthritis, but they often occur in cycles with flare-ups and periods of improvement.
Types of spondyloarthritis
Spondyloarthritis includes several related conditions:
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Axial spondyloarthritis, which mainly affects the spine
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Ankylosing spondylitis, a more advanced form with visible changes on X-rays
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Psoriatic arthritis, associated with psoriasis
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Reactive arthritis, triggered by infections
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Arthritis related to inflammatory bowel disease
Each type shares similar features but may affect different parts of the body.
Common causes
Spondyloarthritis develops due to a combination of genetic factors and changes in the immune system.
Genetic factors play an important role in the development of this condition. The HLA-B27 gene is strongly associated with spondyloarthritis, and having a family history of the disease can increase the risk.
Changes in the immune system also contribute to the condition. The immune system becomes overactive and triggers inflammation in the joints and surrounding tissues. Inflammatory pathways, including TNF and IL-17, play a key role in this process.
Environmental factors may also influence how the disease develops. In some cases, infections in the digestive or urinary tract can trigger a form known as reactive arthritis. In addition, smoking and excess weight may worsen disease progression.
These factors work together to influence the development and progression of spondyloarthritis.
Confirming a diagnosis
Spondyloarthritis is diagnosed based on a combination of symptoms, physical exam findings, imaging tests, and lab results. Doctors often look for signs of inflammatory back pain along with involvement of other joints or organs.
Imaging tests such as X-rays or MRI scans are used to identify inflammation or structural changes in the sacroiliac joints and spine. MRI is especially helpful in early stages, when X-rays may still appear normal.
Blood tests may include checking for the HLA-B27 gene and markers of inflammation. Classification criteria, such as those from the Assessment of SpondyloArthritis International Society (ASAS), can help support the diagnosis when combined with clinical findings.
Treatment options
Treatment for spondyloarthritis depends on the type and severity of the condition and usually includes a combination of medications and lifestyle strategies.
1. Medications
Nonsteroidal anti-inflammatory drugs (NSAIDs) are often used as a first-line treatment to help reduce pain and inflammation.
Biologic medications, such as TNF inhibitors and IL-17 inhibitors, can be prescribed to better control inflammation when symptoms are more severe or do not respond to initial treatment.
Other advanced treatments, including JAK inhibitors, may also be used in certain cases to help manage the disease.
2. Physical therapy and exercise
Regular exercise plays an important role in maintaining flexibility and supporting proper posture.
Physical therapy can help improve mobility, reduce stiffness, and support overall joint function.
3. Lifestyle changes
Avoiding smoking may help slow the progression of spondyloarthritis and improve overall health.
Maintaining a healthy weight can reduce stress on the joints and help manage symptoms more effectively.
Prevention measures
There is no guaranteed way to prevent spondyloarthritis, but some steps may help reduce risk or improve long-term outcomes:
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Early recognition and treatment of symptoms
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Prompt treatment of infections that may trigger reactive arthritis
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Regular physical activity to support joint health
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Avoiding smoking
These measures may help reduce complications and slow disease progression.
When to see a doctor
Medical evaluation is recommended when back pain lasts for several months, especially if it improves with movement and worsens with rest. Other warning signs include joint swelling, eye inflammation, or skin changes.
Early diagnosis allows for timely treatment, which can help prevent long-term joint damage and improve quality of life.