Great question — and yes, there is an important difference between mechanical and inflammatory sacroiliitis, and understanding which one you're dealing with really matters for treatment.
Mechanical Sacroiliitis can be triggered by
- Intense physical activity or overuse
- Poor core strength putting extra stress on the Show Full Answer
Great question — and yes, there is an important difference between mechanical and inflammatory sacroiliitis, and understanding which one you're dealing with really matters for treatment.
Mechanical Sacroiliitis can be triggered by:
- Intense physical activity or overuse
- Poor core strength putting extra stress on the sacroiliac (SI) joint
- Muscle imbalances or poor posture
- Injury or strain
With mechanical causes, pain tends to worsen with activity and improve with rest. Inflammatory Sacroiliitis — the kind linked to spondylitis — works quite differently. It's driven by the immune system mistakenly attacking the SI joint, causing swelling and fluid buildup.
Key signs it may be inflammatory:
- Pain is worse in the morning or after long periods of rest
- Pain improves with movement and exercise
- Stiffness lasts more than 30 minutes upon waking
- Symptoms persist for 3 months or more
- NSAIDs (like ibuprofen) noticeably help The tricky part is that both types can feel similar, and imaging like MRI isn't always conclusive on its own. A rheumatologist can help piece together the full picture using your symptoms, blood markers, and imaging.
It's worth having an honest conversation with your doctor about your workout intensity and core strength too — both are relevant clues.
May 4
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