Inflammatory Arthropathy – Hip

Lower Limb

Overview

Inflammatory arthropathy of the hip encompasses conditions such as rheumatoid arthritis, ankylosing spondylitis, and psoriatic arthritis affecting the hip joint, characterized by synovial inflammation, progressive cartilage and bone destruction, and systemic manifestations. The condition presents with insidious onset of pain, morning stiffness lasting >1 hour, and progressive loss of hip mobility if untreated. Early recognition and aggressive medical management are critical to prevent permanent joint damage and disability.

Pathophysiology

Inflammatory arthropathies involve autoimmune-mediated destruction of the synovial membrane, leading to excessive production of pro-inflammatory cytokines (TNF-α, IL-6, IL-17) and activation of osteoclasts. This triggers erosion of articular cartilage and subchondral bone, causing joint space narrowing, capsular fibrosis, and eventual joint ankylosis in advanced cases. The inflammatory cascade also affects periarticular structures, including hip flexors, abductors, and external rotators, contributing to functional loss and muscle atrophy.

Patient Education

Early and consistent engagement with your rheumatologist, combined with movement and gentle strengthening, significantly improves long-term outcomes and reduces joint damage—do not avoid activity due to pain, but rather modify it intelligently.

Typical Presentation

Site

Groin (anterior hip), medial thigh, and sometimes buttock; often bilateral and symmetrical in rheumatoid arthritis

Quality

Deep, aching, inflammatory pain; often described as stiffness and morning pain before mobility improves

Intensity

Moderate to severe, typically worse in early morning (>1 hour of stiffness) and after periods of inactivity; may be 6-8/10 at worst

Aggravating

Prolonged sitting, early morning on waking, inactivity, cold weather, excessive weight-bearing activities

Relieving

Gentle movement and warming, NSAIDs or biologic medications, short periods of rest (not prolonged immobility), heat application

Associated

Systemic fatigue, elevated inflammatory markers (ESR, CRP), early morning stiffness >1 hour, swelling of other joints, skin manifestations (psoriasis, rashes), eye involvement (uveitis), general malaise

Orthopaedic Tests

Test descriptions are written with AI assistance from standard clinical texts. Where a test lists Sources, its description has been checked against them; those sources are independent and do not endorse OsteoKit. Accuracy figures and grades (A–D) appear only when checked against the published study; tests without one are marked “No accuracy study”.

Further reading: full test procedures are described in standard clinical examination texts, e.g. Magee & Manske, Orthopedic Physical Assessment (7th ed.), and Cook & Hegedus, Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd ed.).

No accuracy study

FABER Test (Flexion-Abduction-External Rotation)

Procedure

Patient supine. Place the foot of the tested leg on the opposite knee, then let the knee fall outwards with gentle overpressure.

Positive Finding

Groin pain, or less range than on the other side.

Interpretation

Groin pain points to the hip joint but does not show whether the cause is inflammatory, degenerative or mechanical.

Sources

No accuracy study

Hip Internal Rotation (Prone)

Procedure

Patient prone with the knee bent to 90°. Let the lower leg fall outwards to turn the hip in, and compare the range with the other side. It can also be tested sitting or supine with the hip bent.

Positive Finding

Reduced or painful internal rotation.

Interpretation

Loss of internal rotation is often the first movement lost in hip joint disease, inflammatory or degenerative. Morning stiffness lasting a long time, other swollen joints, back pain and stiffness in a younger person, or raised inflammatory markers suggest an inflammatory cause and need GP or rheumatology referral.

Sources

No accuracy study

Scour Test

Procedure

Patient supine. Bend the hip to about 90°, push gently down the thigh into the joint, and sweep the knee across the body in an arc.

Positive Finding

Groin pain, catching or grinding.

Interpretation

Loads the hip joint surfaces. Pain points to the hip joint but does not identify the cause.

No accuracy study

FABER Sacroiliac Screen

Procedure

Patient supine in the FABER position (foot on opposite knee). Hold the opposite pelvis down and press the bent knee towards the plinth.

Positive Finding

Pain in the buttock or low back rather than the groin.

Interpretation

Buttock pain in this position points to the sacroiliac joint. In a younger person with inflammatory back pain, sacroiliac involvement raises the possibility of axial spondyloarthritis, which can also affect the hips; refer to the GP for assessment.

Sources

No accuracy study

Log Roll Test

Procedure

Patient supine with the legs straight and relaxed. Roll the whole leg inwards and outwards, comparing with the other side.

Positive Finding

Groin pain, or reduced or guarded rotation.

Interpretation

Moves the hip joint without loading the muscles, so pain points to the joint (synovitis, arthritis) rather than soft tissue.

No accuracy study

Adductor Squeeze Test

Procedure

Patient supine, hips bent to 45° and knees to 90°. Place your fist between the knees and ask the patient to squeeze.

Positive Finding

Groin pain.

Interpretation

Mainly loads the adductors and the pubic symphysis. It helps separate adductor or pubic pain from hip joint pain but is not a test of the hip joint.

Sources

⚠ Red Flags

  • •Rapid bilateral hip pain with fever, suggestive of septic arthritis requiring immediate imaging and culture
  • •Suspected hip fracture or avascular necrosis (sudden worsening of pain, mechanical symptoms)
  • •Signs of cauda equina syndrome (bilateral leg pain, bowel/bladder dysfunction, progressive neurological deficit)
  • •Systemic features suggesting undiagnosed inflammatory arthropathy (persistent polyarticular swelling, constitutional symptoms, positive rheumatological serology)
  • •Hip dislocation or severe structural damage on imaging requiring urgent orthopaedic review
  • •Evidence of severe osteoporosis with spontaneous fracture (common in RA and ankylosing spondylitis)

⚡ Yellow Flags

  • •High fear-avoidance beliefs about movement and activity, leading to deconditioning and stiffness
  • •Depression or anxiety secondary to chronic pain and functional limitation
  • •Poor medication adherence due to side effect concerns or health beliefs
  • •Social isolation and reduced participation in activities; loss of occupational or leisure roles
  • •Catastrophizing about joint damage and disease progression
  • •Poor sleep quality due to nocturnal pain and stiffness, exacerbating inflammatory state

Osteopathic Techniques

Refer first

Inflammatory arthritis of the hip (for example spondyloarthritis or rheumatoid arthritis) needs a medical diagnosis and drug treatment, so refer first. In spondyloarthritis, anti-inflammatories are the first-line drug treatment, with exercise, physical therapy and education as the foundation alongside.

Rehabilitation Exercises

Supine Hip Flexion with Knee Bend (Pendulum)

Range of MotionBeginner

Supine Hip Internal and External Rotation (Clam Variations)

Range of MotionBeginner

Modified Pigeon Pose (Hip External Rotator Stretch)

StretchingBeginner

Supine Hip Flexor Stretch (Recumbent Quads and Iliopsoas)

StretchingBeginner

Supine Glute Bridges (Hip Extension and Abduction Activation)

StrengtheningBeginner

Side-Lying Hip Abduction with Resistance Band

StrengtheningIntermediate

Standing Hip Abduction Machine or Theraband (Gluteus Medius Isolation)

StrengtheningIntermediate

Quadruped Hip Extension (Donkey Kicks with Control)

StrengtheningIntermediate

Single-Leg Stance with Arm Support (Hip Stabilization and Proprioception)

BalanceIntermediate

Standing Hip Alignment and Pelvic Stability Awareness

PosturalBeginner

Aquatic Therapy or Swimming (Low-Impact Aerobic Conditioning)

CardiovascularIntermediate

Supine Hip Adduction and Abduction (Supported Side-to-Side Movement)

Range of MotionBeginner

Referral Criteria

  • •Suspected new diagnosis of inflammatory arthropathy: urgent referral to rheumatology for serology (RF, anti-CCP, ANA, ESR, CRP) and imaging (X-ray, ultrasound, or MRI)
  • •Uncontrolled inflammatory markers or progressive joint damage despite current therapy: liaison with rheumatologist to escalate immunosuppressive or biologic therapy
  • •Signs of hip joint instability, severe cartilage loss, or bone erosions on imaging: orthopedic consultation for possible hip joint replacement or surgical intervention
  • •Development of hip flexion contracture, severe stiffness, or functional loss despite conservative management: may require surgical intervention (arthroscopic debridement or arthroplasty)
  • •Systemic manifestations (uveitis, cardiac involvement, severe constitutional symptoms): urgent internal medicine or specialist review
  • •Contraindication to further manual therapy due to acute flare, severe inflammation, or bone loss: defer osteopathic treatment pending medical optimization
  • •Suspected septic arthritis (fever, acute onset, marked systemic symptoms): emergency department evaluation and joint aspiration required