Ligamentous instabilities in the hip area

Anatomy and function: What stabilizes the hip?

The hip is a ball joint. Stability is created through the interaction of bony shape, labral sealing ring, strong joint capsule with ligaments and dynamic muscle control. In the case of ligamentous instability, the passive support via the capsule and ligaments is weakened - the ball (femoral head) can move minimally in the socket roof (acetabulum), which increases pain and irritation.

• Iliofemoral ligament (Lig. iliofemorale): most important anterior stabilizer, limits extension and external rotation.
• Pubofemoral ligament (pubofemoral ligament): slows down abduction and external rotation.
• Ischiofemoral ligament (Lig. ischiofemorale): stabilizes dorsally, limits internal rotation.
• Ligamentum teres: intra-articular ligament, contributes to fine guidance and pain modulation in adults.
• Joint capsule: tight cover; their tension and integrity are central to micro-stability.
• Labrum acetabulare: “Seal” on the edge of the socket, improves suction/sealing effect and joint centering.

Causes and risk factors

The triggers are diverse. Often there is not just one factor, but an interplay of tissue properties, loading patterns and bony conditions.

• Generalized hypermobility/laxity (e.g. high Beighton score), connective tissue variants.
• Reduced bone coverage due to the condition (borderline hip dysplasia) with increased demands on the soft tissue stabilizers.
• Sport-specific overload in final positions (dance, gymnastics, martial arts, ballet, yoga with strong stretching).
• Repeated microtraumas or one-time injuries (e.g. ligament/capsule strain, rupture of the ligamentum teres).
• Iatrogenic causes after surgery (e.g. inadequately closed capsule after hip arthroscopy).
• Pregnancy-associated laxity (hormonal changes), postpartum instability symptoms.
• Combination with Femoroacetabular Impingement (FAI): altered joint mechanics can promote instability.

Important: Not all laxity is pathological. What is crucial is the combination of symptoms, loss of function and objective findings.

Symptoms: How can hip instability be recognized?

• Deep groin pain, often stabbing or dull, occasionally radiating to the front thigh.
• Feeling like the hips are buckling, unsteady, or giving way, especially when changing direction.
• Clicking, snapping or locking sensation (occasionally painless).
• Worsening extension/external rotation (e.g. increasing stride length, walking downhill, getting out of the car).
• Starting pain after sitting, stress-related complaints, lying on the side at night is often uncomfortable.
• Occasionally accompanying trochanteric pain due to overloading of the abductors or the iliotibial tract structure.

Warning signs that should be quickly clarified by a doctor: sudden severe pain after trauma, fever/general symptoms, increasing restriction of movement, visible misalignment or neurological deficits.

Diagnostics: step by step to a reliable assessment

Diagnosis is based on history, clinical tests and imaging techniques. The aim is to objectify instability, rule out differential diagnoses and identify structural influencing factors.

• History: character of pain, triggers, sports, previous interventions, pregnancy/postpartum, hypermobility (Beighton score).
• Clinical tests: dial/log roll test (increased external rotation), anterior apprehension test, HEER/AB-HEER test, Stinchfield test; Gait and stance analysis.
• X-ray (pelvis overview/Dunn images): hip roofing (LCEA), cup inclination (Tönnis angle), cam/pincer morphology.
• MRI (if necessary, arthro-MRI): assessment of the capsule (thinning, defects), labrum, cartilage, ligamentum teres; Rule out other intra-articular causes.
• Sonography (dynamic) for tendon/bursal involvement; Functional analyses.
• Diagnostic injection: intra-articular infiltration can isolate the source of pain.

Important differential diagnoses: labral lesions without instability, femoroacetabular impingement, adductor or iliopsoas tendinopathies, lateral hip pain syndrome (trochanter), SIJ problems.

Conservative therapy: train stability, calm irritation

Conservative treatment is the first choice. It aims to reduce pain, improve neuromuscular control and build resilient stability around the hip and pelvis. A structured, individual rehabilitation plan over 8-12+ weeks makes sense.

• Exercise examples (symptom-adapted): Pelvic clock/pelvic tilt control, dead bug, side plank (modified), clamshells, hip abduction with mini band, bridge with isometric adduction, monster walks, step-ups in a small range.
• Walking/running technique: shorter stride length, slightly increase stride frequency, avoid excessive hip extension.
• Manual therapy: gentle techniques for regulating tone; Avoid aggressive stretches of the anterior capsule.
• Aids: temporary lap belt/hip stabilizer orthosis during everyday peak loads (individual).
• Medication: short-term NSAIDs or analgesics after medical consultation; Cooling/heat depending on tolerance.
• Injections: targeted and reserved. Intra-articular cortisone can reduce pain in the short term to enable practice; PRP may be considered for associated tendon issues – evidence for capsular laxity is limited.

What you can do yourself: Pause irritating activities, stagger the daily load (pacing), make sure you have sturdy shoes, sleep in a position with a pillow between your knees, and do not hold provocative stretching positions.

Interventional and surgical options – clearly indicated, carefully considered

Interventions can be considered if, after consistent, specialist-led physiotherapy over several months, relevant instability with functional limitations continues and a clear cause can be identified in the image/clinically.

• Arthroscopic capsular tightening/plication: tightening of the anterior/antero-lateral capsule; often combined with labral reconstruction/refixation when indicated.
• Treatment of the teres ligament: debridement for partial tears; Reconstruction only in selected cases and after conservative measures have been exhausted.
• Correction of bony factors: in cases of severe dysplasia, a periacetabular osteotomy (specialized centers) can be considered.
• Revision after previous surgery: closure/reconstruction of an insufficient capsule.

Realistic expectations, precise indications and a structured rehabilitation concept are crucial. Surgical procedures can improve symptoms, but do not guarantee complete freedom from symptoms. We provide you with evidence-based and individual advice.

Course and prognosis

Many patients benefit from targeted stabilization programs within 8–12 weeks. If there is pronounced laxity, accompanying structural findings or long-standing symptoms, rehabilitation is often slower and requires more patience.

• Favorable factors: good training adherence, solid core and gluteal muscles, adjustable sports load.
• Challenging factors: bony underroofing (dysplasia), generalized hypermobility, iatrogenic capsular insufficiency, multicomponent pain.
• Long-term: untreated microinstability can stress the labrum and cartilage. Early, conservative stabilization therefore makes sense.

Prevention: Stable instead of overstretched

• Technical training in sports: controlled range of motion, do not “post” end positions.
• Strength training the lateral hip stabilizers and deep rotators as a routine.
• Balanced load control, planning recovery phases, gradual progression.
• Be careful with passive, forced stretching of the anterior capsule (e.g., extreme lunge positions).
• Postpartum: slow, structured return to work with a focus on pelvic floor and pelvic stability.

Self-help and everyday tips

• Everyday life: shorter steps, stairs at a calm pace, carrying luggage close to your body.
• Sitting: Do not keep your hips permanently in a maximum extension/external rotation position (e.g. crossing your leg).
• Sleep: lying on your side with a pillow between your knees; Lie on your back with a small pillow under your knees.
• Exercise: daily, light stabilization exercises; It's better to do it regularly, briefly, rather than rarely, intensively.
• Warning signal: Increase in pain >24-48 hours after a session = adjust load.

When should you seek medical advice?

• Groin pain or feeling of instability lasting more than 3-6 weeks despite rest/exercises.
• Recurring “folding away”, blockages or painful snapping phases.
• Persistent uncertainty/pain after hip surgery.
• Acute trauma with immediate increase in pain and function.
• Systemic signs (fever, peak pain at rest) – please clarify promptly.

Related symptoms

Instability can be associated with hip tendon and burr problems. Common companions include: B. lateral hip pain due to abductor overload or groin pain due to iliopsoas irritation. Read our more in-depth pages below.