Sacroiliac Ankylosing Spondylitis: What to Know

The sacroiliac joints connect the lower spine with the pelvis. In ankylosing spondylitis, inflammation in these joints may cause deep buttock or lower-back discomfort, stiffness after rest, and reduced spinal movement. Morning joint stiffness that eases as you move can fit an inflammatory pattern, although symptoms vary. Ankylosing spondylitis can also involve other joints, the eyes, skin, or bowel, so a broader health history matters.

Assessment may include an examination of spinal and hip movement, blood tests, and imaging chosen by a clinician. A scan is interpreted alongside your symptoms; no single symptom confirms the condition.

Keep gently active within your comfort, with attention to posture, spinal mobility, breathing movement and hip flexibility. A physiotherapist can adapt exercise therapy to your current movement and flare pattern. Hydrotherapy may make movement more comfortable when land-based exercise feels difficult. Your doctor may consider anti-inflammatory medication or other treatment according to your health, examination and diagnosis. Avoid forcing a painful stretch or stopping prescribed medicine without advice.

Arrange a clinical review if sacroiliac pain or stiffness persists, repeatedly returns, limits sleep or movement, or is accompanied by unexplained fatigue, eye redness, skin changes or bowel symptoms. Seek urgent help for new loss of bladder or bowel control, numbness around the groin, marked leg weakness, fever with severe pain, or pain after a significant injury.

Could my pattern suggest inflammatory sacroiliac disease? Which examination or imaging is appropriate? What activity is suitable during a flare? How will we monitor treatment, eye symptoms, and changes in spinal movement?