Sacroiliac Joint Pain: Which Symptoms

Medically reviewed | Published: | Evidence level: 1A
A September 14 Harvard Health explainer highlights the sacroiliac joints as a possible source of lower back and buttock pain. Physical therapy can help, but accurate assessment matters because spinal conditions and inflammatory disease can produce similar symptoms.
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Quick Facts

Sacroiliac Joint Anatomy
2 joints connect spine–pelvis
Exercise Trial Size
51 participants
Exercise Trial Follow-up
24 weeks

What does sacroiliac joint pain feel like?

Quick answer: Sacroiliac joint pain often affects one side of the lower back or buttock and can extend toward the hip or leg.

The sacroiliac joints connect the sacrum at the base of the spine with the pelvis. Strong ligaments normally limit their movement. Injury, pregnancy-related ligament changes, and inflammatory conditions can contribute to symptoms, although the cause is not always clear. Pain extending into the leg can resemble sciatica, making location alone an unreliable guide to diagnosis. [Harvard Health Publishing](https://www.health.harvard.edu/bones-and-joints/sacroiliac-joint-pain-causes-symptoms-and-exercises-that-help).

Assessment usually includes examination of the hips, spine, strength, sensation, and movements that reproduce symptoms. An American Family Physician review recommends interpreting several pain-provocation tests together rather than relying on one maneuver. Scans can help investigate alternative causes, but they do not reliably establish whether an otherwise mechanically painful sacroiliac joint is responsible for symptoms. [American Family Physician](https://www.aafp.org/afp/2022/0300/p239).

Which exercises can help sacroiliac joint pain?

Quick answer: Individually selected strengthening and stretching exercises may improve symptoms, although research does not establish one best routine.

Harvard Health describes bridges and bird dogs among exercises a physical therapist may use, alongside selected stretches. The choice depends partly on whether the assessment suggests excessive mobility or restricted movement. That distinction helps explain why a routine that suits one person may not suit another. Exercise selection should follow an assessment rather than a self-diagnosis based on pain location. [Harvard Health Publishing](https://www.health.harvard.edu/bones-and-joints/sacroiliac-joint-pain-causes-symptoms-and-exercises-that-help).

A randomized trial published in Pain Physician in 2019 assigned 51 patients to exercise therapy, manipulation, or both. All groups improved compared with their starting measurements, and no statistically significant differences between groups remained at 24 weeks. However, the study lacked an untreated or usual-care comparison group, limiting conclusions about how much improvement resulted from treatment rather than natural recovery or other factors. The findings support further investigation of rehabilitation; they do not demonstrate that combining treatments is always superior or that any particular home exercise guarantees relief. [Nejati and colleagues](https://pubmed.ncbi.nlm.nih.gov/30700068/).

When should lower back or buttock pain receive medical attention?

Quick answer: Persistent or limiting pain warrants assessment, while new bladder or bowel problems, genital numbness, or symptoms affecting both legs require emergency evaluation.

The NHS advises emergency assessment for back pain accompanied by difficulty urinating, loss of bladder or bowel control, reduced sensation around the genitals or anus, or pain, weakness, tingling, or numbness in both legs. Back pain after a serious accident also needs emergency care. Fever, feeling generally unwell, or severe pain that starts suddenly or worsens quickly warrants urgent assessment. These symptoms should not be managed by simply trying additional stretches. [NHS back pain guidance](https://www.nhs.uk/conditions/back-pain/).

For continuing symptoms without emergency features, clinicians can reassess the diagnosis and rehabilitation plan. Some patients may benefit from a pelvic support belt, particularly around pregnancy and childbirth. When conservative care fails, specialist options can include diagnostic anesthetic injections, corticosteroid injections, or procedures targeting pain-transmitting nerves. These require careful patient selection and assessment of the likely pain source. [American Family Physician](https://www.aafp.org/afp/2022/0300/p239).

Frequently Asked Questions

No. A painful movement cannot reliably identify the source. Clinicians combine the history with several examination findings and consider conditions affecting the spine and hips. [American Family Physician](https://www.aafp.org/afp/2022/0300/p239).

For uncomplicated back pain, NHS guidance recommends staying active and avoiding prolonged bed rest. Stop exercises that worsen pain and seek advice about suitable activity. Emergency symptoms require immediate assessment. [NHS](https://www.nhs.uk/conditions/back-pain/).

References

  1. Christensen L. Sacroiliac joint pain: Causes, symptoms, and exercises that help. Harvard Health Publishing. September 14, 2026. Reviewed by Christopher M. Bono, MD. [Article](https://www.health.harvard.edu/bones-and-joints/sacroiliac-joint-pain-causes-symptoms-and-exercises-that-help).
  2. Newman DP, Soto AT. Sacroiliac Joint Dysfunction: Diagnosis and Treatment. American Family Physician. 2022;105(3):239–245. [Clinical review](https://www.aafp.org/afp/2022/0300/p239).
  3. Nejati P, Safarcherati A, Karimi F. Effectiveness of Exercise Therapy and Manipulation on Sacroiliac Joint Dysfunction: A Randomized Controlled Trial. Pain Physician. 2019;22(1):53–61. [PubMed](https://pubmed.ncbi.nlm.nih.gov/30700068/).
  4. NHS. Back pain. [Patient guidance](https://www.nhs.uk/conditions/back-pain/).