What it is
Sacroiliac joint dysfunction is pain from the joint between the sacrum and ilium. It follows ligament strain, altered load through pregnancy or postpartum, a fall onto the buttock, or repetitive asymmetrical tasks. Pain is usually one-sided and can refer to the buttock, groin, or thigh.
Care improves control of the pelvis and hips, restores stride and lifting mechanics, and builds endurance so standing, walking, and stairs feel steady.
What happens when it occurs
The joint and surrounding ligaments become sensitive. Muscles around the pelvis become stiff, and gait becomes impaired. Targeted strength and control restore tolerance to single-leg tasks and transfers.
Common causes and risk factors
- Pregnancy and postpartum changes
- Asymmetrical sports or work, such as kicking or carrying on one side
- Falls onto the buttocks or tailbone
- Leg length difference or hip stiffness
Who is most affected
Women present more often than men in Australian clinics, particularly during and after pregnancy. Runners and field athletes also feature.
Typical symptoms
- Pain near the dimple at the back of the pelvis on one side
- Pain with rolling in bed, getting out of a car, or climbing stairs
- Occasional groin or thigh referral without true nerve symptoms
When to seek care
If pain limits walking, sleep, or caring for a child. Urgently if there is progressive weakness, numbness, or changes in bladder or bowel function.
How we diagnose
History, cluster of provocation tests, gait and single-leg control assessment, and lumbar and hip screening. Imaging is used to exclude other causes when atypical features are present.
Management
- Pelvic control and hip strength, especially gluteals and deep abdominals
- Gait retraining and stride symmetry
- Task-specific drills for transfers, stairs, and lifting
- Belts or taping for short-term support in selected cases
- Medication or injections in persistent presentations
Rehabilitation milestones
Phase 1 weeks 0 to 2: pain control, supported walking, basic control drills.
Phase 2 weeks 2 to 8: strength for hips and trunk, single-leg endurance, task practice.
Phase 3 months 2 to 4: running, field drills, or manual work by criteria.
Readiness to progress
- Single-leg stance and step-down without pain
- Hip and trunk strength benchmarks met
- Daily tasks and sleep are unaffected
Prevention
- Balance single-leg training in sport and gym
- Strengthen hips and trunk twice weekly
- Distribute loads evenly during manual tasks
Australia snapshot
- Common in pregnancy and postpartum care, and in running and field sports
- Most improve with targeted control and strength
- Short-term support belts are readily available when indicated
Latest insights
Control the pelvis, and the pain often fades.
Short-term support can help early, but strength secures long-term results.
