Management may include rehabilitation, activity modification and treatment of contributing problems. In selected cases, an image-guided diagnostic or therapeutic injection may be considered, but only after the clinical picture has been reviewed.
Why pain around the sacroiliac joint can be difficult to diagnose and why the examination matters as much as the scan.
Consultant Radiologist and Interventional Pain Specialist • Updated 16 September 2026
Pain around the sacroiliac joint can mimic lower-back, buttock or hip pain. No single symptom or scan proves the diagnosis. A focused history, examination and consideration of alternative causes are essential before treatment is discussed.
The sacroiliac joints connect the sacrum at the base of the spine to the pelvis. Pain arising around this region is commonly felt low in the back or buttock and can sometimes spread into the thigh.
The symptoms overlap with lumbar facet pain, hip problems, muscular pain and nerve-related conditions. Imaging can identify inflammation, arthritis or other structural abnormalities, but many patients have non-specific imaging findings.
The clinician looks at the pattern of pain, aggravating activities, hip and spine movement, neurological features and a group of physical examination manoeuvres. The value comes from the pattern rather than one isolated test.
Management may include rehabilitation, activity modification and treatment of contributing problems. In selected cases, an image-guided diagnostic or therapeutic injection may be considered, but only after the clinical picture has been reviewed.
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It can sometimes produce pain around the buttock, lower back or groin, but hip and other causes should also be considered.
No. MRI can be useful in some inflammatory or structural conditions, but it does not diagnose all mechanical SI joint pain.
Not always. Injections are considered only in selected cases after clinical assessment.
This article is general information and does not replace an individual medical assessment.
If pain is affecting your sleep, work, mobility or confidence, a specialist assessment can help clarify what is happening and what the sensible next step should be.
