What is SI joint dysfunction?

The sacroiliac joints connect the sacrum to the pelvis and help transfer load between the trunk and legs. SI-region pain is often felt near one side of the posterior pelvis, but similar symptoms can also come from the lumbar spine, hip, nerves or other pelvic structures.Confirming that the SI joint, and not the spine or hip, is the source is the first job of the examination.

Which exercises should I avoid with SI joint pain?

There is no universal list of exercises that everyone with SI-region pain must avoid. During a flare, movements that clearly worsen symptoms may be temporarily modified. The longer-term goal is usually a graded return to the strength and movement demands relevant to the individual.Blanket "never do this again" lists usually say more about the list-writer than the joint.

Why did SI joint pain start during or after pregnancy?

Pregnancy-related pelvic girdle pain is multifactorial. Hormonal, biomechanical, neuromuscular and load-related changes may all contribute. Orthopedic and pelvic-health assessment can be combined when symptoms involve the SI region, hips, abdominal wall or pelvic floor.Both live in one clinician here: see pelvic health & postpartum care for that side of the story.

ORTHOPEDIC & SPORTS REHABILITATION · STAFFORD, VA

SI Joint Pain: Why It Keeps Coming Back

Sacroiliac joint pain is real, but the feeling that the pelvis is "out" does not mean the joint has simply slipped out of position. It doesn't, and understanding why is the beginning of actually fixing it. A careful examination helps distinguish SI joint pain from lumbar spine, hip, nerve and other pelvic-region causes. This page explains what SI joint dysfunction is, what drives it, and how it is treated in your home.

Anatomical illustration of SI joint inflammation

Physical therapist assisting patient with SI joint exercise.

THE SI JOINT, WITHOUT THE ALIGNMENT STORY

Does The SI Joint Really Go Out Of Place?

No, and that matters. The sacroiliac joints move only a few millimeters and are held by some of the strongest ligaments in the body; they do not slip out of position. What changes is how load is shared and how sensitive the area becomes: both treatable, in your home across Stafford County and select nearby communities.

The distinction isn't pedantry. If you believe your pelvis is unstable and misaligned, the logical treatment is endless adjustments and a lifetime of caution. If the problem is sensitivity and load-sharing, which the evidence supports, the logical treatment is calming the system and rebuilding its capacity. Only one of those plans ends.

THE BASICS

What Is SI Joint Pain?

The sacroiliac joints connect the sacrum to the pelvis and help transfer load between the trunk and lower extremities. SI-region pain is often felt near one side of the posterior pelvis and may be aggravated by rolling in bed, stairs, prolonged positions, transitions, walking or single-leg loading.

Similar symptoms can also come from the lumbar spine, hip, nerves or other pelvic structures, so location alone is not enough to diagnose the SI joint.

DIFFERENTIAL CLINICAL EXAMINATION

How Is The SI Joint Assessed?

Pain-Provocation Clusters

No single palpation or 'alignment' test can reliably confirm that the SI joint is the pain source. A commonly studied approach uses a cluster of pain-provocation tests that attempt to reproduce the patient's familiar symptoms. In a blinded diagnostic study using anesthetic SI joint injection as the reference standard, three or more positive tests out of six produced 94% sensitivity and 78% specificity.2

Reference Standard: Laslett Et Al.

Systemic & Spinal Differential

That does not mean every positive test proves SI joint pathology. The examination still needs to consider the lumbar spine, hip, neurological findings, trauma history, pregnancy/postpartum factors and red flags.

Spine, Hip & Neural Screening

Millimeter-Range Motion

The SI joint does move, but motion is small. Research using in-vivo and biomechanical measurement consistently describes movement in the low-degree and low-millimeter range rather than large positional shifts that can be reliably seen or corrected by comparing leg lengths or palpating pelvic landmarks.1,3

Kissling & Jacob; Hammer Et Al.

Therapist assisting a patient with SI joint exercises

THE PLAN

What Does Treatment Look Like?

At Divine Physical Therapy, treatment follows The Divine Restore & Reset Movement Method™: Assess → Restore → Own It → Reset When Needed. Depending on the examination, care may include education, manual therapy, mobility work, trunk and hip strengthening, gait or movement retraining, progressive single-leg loading and return to the tasks that matter to you.

Manual therapy can be useful for some clients, but it is not framed as "putting the pelvis back."

SELECTED EVIDENCE: A 2024 meta-analysis of 16 randomized trials found that SI joint manual therapy had an uncertain effect on pain and a moderate effect on disability, with low or very-low certainty of evidence and no clear best technique.4 Small randomized trials have also found improvement with both manipulation and stabilization exercise, without consistent evidence that one approach is universally superior.5

Hands-on treatment may help reduce symptoms or improve movement tolerance. The longer-term strategy is to build the capacity needed for walking, lifting, stairs, carrying, exercise and single-leg tasks rather than relying on repeated "realignment."

A COMMON QUESTION

Do SI Belts Help?

They can help some people, especially during pregnancy-related pelvic girdle pain, but response varies.

A belt is best viewed as an optional symptom-management tool, not proof that the joint is unstable or "out."

SELECTED EVIDENCE: In a randomized trial of 105 pregnant women with pelvic girdle pain, a non-rigid lumbopelvic belt plus education was compared with home stabilization exercise plus education and education alone.6

PREGNANCY & POSTPARTUM

Why Can SI-Region Pain Show Up During Pregnancy Or Postpartum?

Pregnancy-related pelvic girdle pain is multifactorial. Hormonal, biomechanical, neuromuscular and load-related changes can all contribute, and symptoms may involve the SI region, pubic symphysis, low back, hips or surrounding tissues. The explanation should not be reduced to "relaxin made your pelvis unstable."

This is where Divine's orthopedic and pelvic-health perspective can be useful. Dr. Paige may assess trunk and hip function, breathing and pressure strategy, pelvic-floor coordination, movement tolerance and the practical demands of pregnancy or postpartum life.

Patient performing core exercises for diastasis recti.

SEE A PHYSICIAN FIRST

When Should SI-Region Pain Be Medically Evaluated First?

Significant trauma

Inability to bear weight

Fever or systemic illness

Unexplained weight loss

Progressive weakness or numbness

New bowel or bladder dysfunction

Saddle-region numbness

Pain that is severe and rapidly worsening

During pregnancy or postpartum, new severe pelvic pain or symptoms accompanied by obstetric concerns should also be discussed with the appropriate medical clinician.

SELECTED EVIDENCE & FURTHER READING

Sources Referenced On This Page

01. Kissling RO, Jacob HA. (1996). The mobility of the sacroiliac joint in healthy subjects. Bull Hosp Jt Dis. Average rotation and translation were small in healthy adults. PubMed.

02. Laslett M, Aprill CN, McDonald B, Young SB. (2005). Diagnosis of sacroiliac joint pain: validity of individual provocation tests and composites of tests. Manual Therapy. PubMed.

03. Hammer N, et al. (2019). Physiological in vitro sacroiliac joint motion: three-dimensional posterior pelvic ring kinematics. J Anat. PubMed.

04. Trager RJ, et al. (2024). Efficacy of manual therapy for sacroiliac joint pain syndrome: a systematic review and meta-analysis of randomized controlled trials. J Man Manip Ther. PubMed.

05. Kamali F, et al. (2019). Comparison of manipulation and stabilization exercises in patients with sacroiliac joint dysfunction: randomized clinical trial. PubMed.

06. Kordi R, et al. (2013). Comparison between the effect of lumbopelvic belt and home based pelvic stabilizing exercise on pregnant women with pelvic girdle pain: a randomized controlled trial. J Back Musculoskelet Rehabil. PubMed.

Research is provided for education and clinical context. Findings from a study population do not establish the diagnosis or predict the outcome of an individual.

KEEP READING

Where To Go Next

Orthopedic & Sports Rehabilitation

The full picture: 75 minutes, the same clinician, no visit caps.

Back Pain

Treating the driver, not just the site, and why backs "go out" again and again.

Pelvic Health & Postpartum

The pelvic floor's role in pelvic girdle pain, assessed by the same clinician.

Frequently Asked

Typically one-sided pain near the pelvic dimple, sometimes referring into the buttock, groin or thigh, provoked by stairs, standing on one leg, rolling over in bed, prolonged sitting or standing up from a chair. Many people also describe a sense of instability or of the pelvis feeling "off."Numbness, progressive weakness, new bowel or bladder changes, or other neurological symptoms require additional screening and may warrant medical evaluation.

Not in the way the phrase usually suggests. The sacroiliac joint normally moves only a small amount. Pain and altered movement can make the pelvis feel shifted or unstable without meaning the joint has dislocated or needs to be "put back."A pop or click does not prove that a bone moved back into position. Symptom changes after manual therapy can occur without demonstrating a lasting positional correction.

Some people report meaningful symptom relief with a pelvic or SI belt, particularly during pregnancy-related pelvic girdle pain. A belt can be used as a temporary support while activity and rehabilitation are progressed, but it is not required for everyone.A helpful response to a belt can guide symptom-management choices, but it does not by itself diagnose SI joint instability or confirm the pain source.

Smiling woman in a blue shirt in a fitness studio.

BEGIN WITH A DISCOVERY CALL

Ready For The Version Of SI Treatment That Ends?

Book a free discovery call and describe the pattern: how it started, what flares it, what's been tried. Dr. Paige will tell you plainly whether it sounds sacroiliac at all, and what a finished plan would involve.