特发性血小板减少性紫癜（ITP）：患者指南

Overview

Ankylosing spondylitis (AS) is a chronic inflammatory disease that primarily targets the spine and the sacroiliac joints (where the spine meets the pelvis). It belongs to a group of conditions called spondyloarthritis. Inflammation can lead to pain and stiffness; over years, new bone may form that fuses vertebrae, reducing flexibility. AS is an autoimmune-related condition, meaning the immune system mistakenly attacks healthy tissue. It often begins in late teens to early adulthood and is more common in men, though women can also develop it. With modern treatments, many people maintain good function and quality of life.

Signs & Symptoms

Symptoms usually start gradually and may come and go in flares. The hallmark is inflammatory back pain that improves with activity and worsens with rest.

• Chronic lower back pain and stiffness, especially in the morning or after inactivity, lasting more than 3 months
• Pain and stiffness in the buttocks (from sacroiliac joints) that may alternate sides
• Reduced flexibility in the spine; difficulty bending or turning
• Pain and swelling in other joints such as hips, shoulders, knees, or heels (enthesitis—inflammation where tendons/ligaments attach to bone)
• Fatigue that can be significant
• In some people: eye inflammation (uveitis) causing redness, pain, light sensitivity, or blurred vision; chest pain or restricted breathing if ribs are involved; rare gut or skin issues

Causes & Risk Factors

The exact cause is unknown, but genetics and the immune system play major roles. Most people with AS carry the HLA-B27 gene, though not everyone with the gene develops the disease, and some people without it still get AS. Environmental triggers such as infections may contribute in genetically susceptible people. Risk factors include family history of AS or related spondyloarthritis, male sex (though underdiagnosis in women is recognized), and younger age of onset (typically under 45). Smoking is linked to more severe disease.

Diagnosis

There is no single test for AS. Diagnosis relies on a combination of medical history, physical exam, imaging, and sometimes blood tests. Your doctor (often a rheumatologist) will ask about inflammatory back pain features, check spinal mobility and joint tenderness, and may order X-rays or MRI of the sacroiliac joints and spine to look for inflammation or structural changes. Blood tests may check for inflammation markers (ESR, CRP) and HLA-B27 status, but these are supportive rather than definitive. Early diagnosis is important because treatment works best before significant damage occurs. Related conditions such as non-radiographic axial spondyloarthritis may be diagnosed when MRI shows inflammation without X-ray changes.

Treatment & Management

There is no cure, but treatments effectively control inflammation, relieve symptoms, preserve mobility, and slow progression. Care is usually led by a rheumatologist and may involve physical therapy.

• Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen are often first-line for pain and stiffness
• Biologic medications (TNF inhibitors or IL-17 inhibitors) or targeted synthetic DMARDs (such as JAK inhibitors) for people who do not respond adequately to NSAIDs; these can dramatically reduce disease activity
• Physical therapy and regular exercise focused on posture, stretching, and strengthening—especially swimming, walking, and spine-extension exercises
• Short-term corticosteroids for severe flares or local injections; long-term oral steroids are generally avoided
• Surgery (rarely) for severe hip damage or spinal deformity
• Treatment of related issues such as uveitis by an ophthalmologist

Your care team will monitor disease activity with questionnaires, exams, and imaging as needed, and adjust therapy to achieve low disease activity or remission.

Living With It

Most people with AS can work, exercise, and enjoy family life with proper management. Consistency with exercise and medications is key. Maintain good posture, use supportive chairs and mattresses, and practice deep breathing to keep the chest flexible. Quit smoking if you smoke—it worsens outcomes. A balanced anti-inflammatory-style diet, healthy weight, and good sleep support overall health. Emotional support matters; chronic pain can affect mood, so consider counseling or patient support groups. Regular follow-up and prompt attention to new symptoms (especially eye problems) help prevent complications. Many people achieve long periods of good control and lead full lives.