Snapping Hip Syndrome (Coxa Saltans)

**Snapping hip syndrome** (coxa saltans) occurs when a tendon or muscle slides over a bony structure in the hip, producing an audible snap, click, or popping sensation. It is classified into three types: **1. External Snapping Hip (65-70% of cases):** The **iliotibial band (ITB)** or the anterior border of the **gluteus maximus** snaps over the **greater trochanter** (the bony prominence on the outer hip). This produces a visible and palpable snap on the OUTSIDE of the hip, often reproduced by rotating from flexion to extension. This is the most common type and is closely related to [trochanteric bursitis](/condition/trochanteric-bursitis) — repetitive snapping can inflame the underlying bursa. **2. Internal Snapping Hip (25-30% of cases):** The **iliopsoas tendon** snaps over the **femoral head** or iliopectineal eminence (a bony ridge on the pelvis). This produces a deep snap felt in the FRONT of the hip or groin. Often occurs when the hip moves from flexion to extension (e.g., getting out of a car, doing sit-ups, or kicking). This type is common in dancers and is harder to diagnose clinically. **3. Intra-articular Snapping Hip (5-10% of cases):** Caused by a **labral tear**, loose body, or cartilage flap INSIDE the hip joint itself. This is the least common but most concerning type — it often indicates joint damage. Patients may feel catching, locking, or giving way in addition to snapping. The vast majority of snapping hips are painless and are simply a normal anatomic variant. Treatment is only needed when the snapping becomes **painful** or limits activities.

## Root Causes by Type **External Snapping Hip:** - Tight iliotibial band (ITB) snapping over the greater trochanter - ITB tightness from weak hip abductors (gluteus medius), running on cambered roads, or inadequate stretching - Gluteus maximus anterior border snapping over the trochanter - More common in women due to wider pelvic anatomy **Internal Snapping Hip:** - Tight iliopsoas tendon snapping over the femoral head or iliopectineal eminence - Iliopsoas tightness from prolonged sitting (hip flexor shortening), dance (repeated high kicks), or sports requiring extreme hip flexion - More common in dancers, gymnasts, and martial artists **Intra-articular Snapping Hip:** - Labral tears — the cartilage rim of the hip socket - Loose bodies — cartilage fragments floating in the joint - Hip impingement (FAI) causing mechanical catching - Often traumatic in origin (sports injury, fall) **Risk Factors for All Types:** - Ballet and dance training (up to 90% prevalence) - Running, cycling, and sports requiring repetitive hip flexion - Muscle imbalance — tight hip flexors/ITB with weak gluteals - Female sex — wider pelvis increases ITB angle over trochanter - Rapid growth spurts in adolescents — tight tendons over growing bones

## Conservative Treatment (First-Line — 80-90% Success for Painful Cases) **1. Stretching Program (Most Important):** *For External Snapping:* - ITB stretching — standing cross-legged stretch, foam rolling the lateral thigh - Gluteal stretching — pigeon pose, figure-4 stretch - Hold each stretch 30 seconds, 3 reps, twice daily *For Internal Snapping:* - Iliopsoas stretching — kneeling hip flexor stretch, Thomas stretch position - Rectus femoris stretching — prone quad stretch with hip extension - Hold each stretch 30 seconds, 3 reps, twice daily **2. Strengthening Program:** - Hip abductor strengthening (clamshells, side-lying leg raises) — reduces external snapping by improving ITB tracking - Core and gluteal strengthening — bridges, single-leg deadlifts - Hip flexor eccentric loading for internal snapping — controlled lowering from flexed position - Gradually increase resistance over 6-12 weeks **3. Activity Modification:** - Avoid movements that consistently reproduce painful snapping - Modify dance or sport technique to reduce repetitive snapping - Cross-train with swimming or cycling during acute painful phases **4. Additional Measures:** - NSAIDs during painful flares (short-term) - Ice over the snapping site after activity — 15-20 minutes - Corticosteroid injection into the trochanteric bursa (external type) or iliopsoas bursa (internal type) — provides 60-80% short-term relief - Ultrasound-guided injection improves accuracy significantly ## Surgical Treatment (<5% of Cases) Indicated only for painful snapping unresponsive to 6+ months of conservative treatment: - **External**: ITB Z-plasty lengthening or arthroscopic bursectomy - **Internal**: Arthroscopic or open iliopsoas tendon release (fractional lengthening) — 85-90% good outcomes in dancers - **Intra-articular**: Hip arthroscopy for labral repair, loose body removal, or FAI correction