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Atlas · Hip

Gemelli and Obturator Internus

This entry groups obturator internus with the superior and inferior gemelli. Obturator internus has a pelvic-wall belly and a tendon that turns into the deep buttock; the gemelli are smaller external muscles beside that tendon. Hip-rotation pain and pelvic/perineal pain require related but distinct assessment paths.

Gemelli and Obturator Internus
Body region
Hip
Trigger points
2
documented in this muscle
Common symptoms
3
patterns cataloged
Contributors
3
Factors to assess

Muscle overview

Symptoms and first steps

Practical first steps

  • Vary sitting and use a comfortable seat that reduces the familiar pressure.
  • Use gentle hip rotation and short walks within tolerance.
  • Avoid blind deep buttock pressure or internal self-release instructions.

When to seek assessment

  • Sudden severe hip/groin pain after a fall, inability to bear weight, fever or a hot swollen joint needs urgent assessment.
  • New progressive leg weakness, saddle numbness or loss of bladder/bowel control needs emergency assessment.
  • Arrange assessment for persistent unexplained night pain, significant trauma, a growing mass or symptoms that do not track movement/load.
  • Acute severe pelvic pain, sudden inability to pass urine, or heavy bleeding needs emergency assessment. Fever, other difficulty emptying the bladder or other unexplained bleeding requires urgent medical assessment. Persistent bladder, bowel or sexual symptoms do not need to wait for failed self-care.

Keep the components explicit: external buttock palpation cannot directly examine the intrapelvic obturator-internus belly, and an internal pelvic examination does not assess all gemelli fibers.

Examination, palpation and treatment evidence

Illustrated overview

Gemelli Obturator · Anatomy 1

Anatomical view of the illustrated muscle.

Open full-size image

Trigger points

1. TrP1

Location. Deep external hip-rotator region; the legacy marker does not distinguish gemelli from the obturator-internus tendon

Trigger point map
Gemelli and Obturator Internus — Gemelli Obturator · Trigger-point examples 1Open full-size image

Regional muscle reference; this is not an individual map of the selected numbered trigger point.

Referred pain map

Map not available

Pain referral. Deep buttock, hip, posterior thigh

Pain Pattern

  • Deep buttock symptom region
  • Posterior hip
  • Proximal posterior thigh

What This Pain Feels Like

Deep buttock pain during hip rotation or sitting may involve several hip, tendon, spinal or neural structures. An external tender region does not selectively identify a gemellus or confirm nerve entrapment.

What Patients Report

  • Deep ache in buttock
  • Pain with hip rotation
  • Sitting discomfort

What Makes It Worse

  • Hip rotation
  • Sitting
  • Running
  • Crossing legs
Browse related exercises (1)

Symptoms patients report

Deep buttock pain with hip rotation Record the particular position and whether active effort or passive hip motion is more provocative.

Sitting or cycling intolerance Pressure-related symptoms can involve the proximal tendon, deep hip, pelvic floor or nerves and need localization.

Pelvic, perineal or sexual symptoms These can accompany pelvic-wall muscle tenderness but require a pelvic-health and medical history.

Contributors to assess

Changed rotational hip demand A new sport, deep squat or prolonged rotational position may provoke symptoms without proving a single deep-muscle lesion.

Pelvic pain and guarding Obturator internus can be tender within a broader pelvic-pain presentation; muscle and organ contributions may coexist.

Sustained sitting or cycling pressure Review symptom timing, saddle/seat pressure and any numbness before prescribing local manual care.

For clinicians and supervised training

Clinical reference

A deep buttock or perineal pain pattern does not prove a deep-rotator trigger point or sciatic/pudendal entrapment. Evidence from piriformis procedures should not be transferred automatically to this group.

Anatomy and palpation

Anatomical relationships

Obturator internus arises from the internal obturator membrane and surrounding bone, then its tendon turns through the lesser sciatic foramen to the medial greater trochanter. Superior gemellus arises near the ischial spine and inferior gemellus from the ischial tuberosity, joining the tendon externally. Together they assist external rotation and abduction of the flexed hip.[1][2][3]

  • Obturator internus belly forms part of the lateral pelvic wall.
  • Ischial spine and tuberosity orient the superior and inferior gemelli.
  • The tendon turns through the lesser sciatic foramen toward the greater trochanter.

Nearby structures. Gluteus maximus overlies the external deep rotators. Sciatic and pudendal neurovascular structures are nearby; the obturator fascia also relates to pelvic-floor attachments.

Palpation

Patient position. External hip examination in supported side lying or prone with appropriate draping. Internal obturator-internus assessment is offered only by a trained pelvic-health clinician after a separate explanation and explicit consent, with a stop signal and chaperone option.

Find the landmarks

  • External ischial/greater-trochanter region
  • Deep rotator plane beneath gluteus maximus
  • Internal lateral pelvic wall only during a consented specialist examination

Examination sequence

  1. First assess hip movement, lumbar/neurological features and pelvic symptom history.
  2. Use gentle external contact to describe regional sensitivity; acknowledge that gluteus maximus overlies the small gemelli and tendon.
  3. If indicated and accepted, a specialist examines lateral pelvic-wall tenderness and gentle hip-rotation contraction to help identify obturator internus, documenting familiar pain and relaxation without forceful pressure.

Document the findings

  • External regional tenderness and internal obturator-internus tenderness are separate findings.
  • Neither establishes nerve entrapment or excludes pelvic-organ disease.

Limits and precautions

  • The patient may decline internal examination and still receive external care and medical evaluation.
  • Do not press toward the sciatic pathway or prescribe needle depths from atlas coordinates.
[1][2][3][4]

Examination and tests

2

Active and passive hip rotation comparison[1]

Assess hip movement and distinguish pain-limited effort from joint restriction.

Position
Seated or supine with the thigh supported and pelvis steady; use the same position on both sides.
Technique
Compare comfortable active internal/external rotation, then clinician-assisted passive rotation. Record range, familiar pain location and whether passive movement is more available than active movement.
Positive finding
Reproducible deep groin/buttock pain, marked restriction or a substantial active/passive difference.
Interpretation
Restricted painful passive movement invites a joint-focused assessment; a larger active deficit may reflect pain or weakness.
Limitations
Hip rotation loads several structures. It cannot isolate a deep rotator or establish a trigger point.

Resisted external rotation with pelvic symptom mapping[1][4]

Assess hip-rotation loading and its relation to familiar buttock versus pelvic symptoms.

Position
Seated with the hip/knee comfortably flexed and pelvis stable; a side-lying version is acceptable.
Technique
Apply light resistance to external rotation while the thigh remains supported. Compare sides and record whether pain is in the deep buttock, groin or pelvis. If a specialist internal examination is separately indicated and consented, gentle contraction may assist obturator-internus identification.
Positive finding
Familiar pain or reproducible weakness during rotation.
Interpretation
Provides a loading baseline; pelvic symptoms may warrant a combined hip/pelvic-floor assessment.
Limitations
All external rotators can contribute. Neither external resistance nor internal tenderness selectively proves one component as the cause.

Distinguishing other causes

Hip-joint or periarticular disease[1]

Findings that matter. Painful restricted passive rotation, deep groin pain or mechanical catching.

Next step. Assess the hip joint and surrounding tendons; consider selective imaging based on the clinical pattern.

Lumbar radiculopathy or deep-gluteal neural pain[7]

Findings that matter. Radiation with sensory/reflex/strength changes or a position-dependent neural pattern.

Next step. Perform neurological and regional back/hip assessment; tenderness alone cannot diagnose sciatic entrapment.

Pelvic-floor myalgia with organ or pudendal pain[4]

Findings that matter. Perineal symptoms, bladder/bowel complaints or pain with sexual activity need a broader pelvic evaluation.

Next step. Coordinate pelvic-health and medical assessment, with internal examination only when indicated and explicitly consented.

Proximal hamstring tendon/ischial-region pain[8]

Findings that matter. Focal sitting-bone pain with sitting and hamstring or deep hip-flexion loading.

Next step. Examine the tendon origin and loading pattern separately from deep hip rotation.

Treatment selection and progression

Exercise and rehabilitation

Graded hip rotation and stance control[1]

Consider when. An assessed mechanical hip-rotation presentation without an acute injury or progressive neurological signs.

Begin a gentle external-rotation isometric in a comfortable supported hip position. Add controlled rotation and a shallow supported squat or step as tolerated, keeping the starting effort low.

Dose and review
Illustrative start: a few brief comfortable holds or slow repetitions, adjusted to the familiar pain and next-day function.
Progression
Increase resistance and the relevant rotation/stance demand gradually; avoid repeated forced end-range stretching.
Stop or reassess
Stop for perineal numbness, spreading leg symptoms or sharp deep groin pain.
Evidence and limits
Anatomy-informed hip rehabilitation; there is no isolated gemelli/obturator-internus MPS trial supporting this exact exercise dose.

Self-care and activity

Adjust sitting and cycling pressure[5]

Consider when. A clear pressure-related symptom with the relevant neural and pelvic causes assessed.

Change position before a sustained flare and use a seat or saddle setup that reduces symptoms. Begin short comfortable walks or breaks and avoid resting on a hard massage ball.

Dose and review
Set the interval from the actual symptom onset rather than a fixed sitting limit.
Progression
Increase the chosen sitting/cycling task gradually while checking for numbness and post-activity pain.
Stop or reassess
Stop cycling and seek assessment for persistent genital/perineal numbness or new urinary/sexual dysfunction.
Evidence and limits
Practical symptom management within pelvic-pain care, not evidence that pressure relief treats a specific deep rotator.

Clinician-delivered care

Pelvic-wall manual care within bladder-pain treatment[6]

Consider when. Pelvic-floor tenderness accompanying assessed bladder-pain syndrome; a pelvic-health examination determines whether local manual treatment fits the broader presentation.

A pelvic-health clinician selects external pelvic, hip or abdominal soft-tissue work and, only with explicit ongoing consent, internal techniques where examined lateral pelvic-wall tenderness is relevant. Include relaxation and graded activity. Internal contact is optional; keep organ-specific assessment and treatment in place.

Dose and review
The trial offered up to ten 60-minute sessions over 12 weeks. Use this as a studied reference, with dose adjusted to consent, tolerance and measurable benefit; an external-only adaptation has not been shown equivalent to the full trial program.
Progression
Follow overall symptom response and a chosen goal such as sitting or wanted sexual activity. Reassess benefit at the end of the agreed course rather than treating residual tenderness indefinitely.
Stop or reassess
Stop any unwanted or intolerable technique immediately. New unexplained bleeding, infection symptoms or sustained symptom worsening require clinical reassessment.
Evidence and limits
Among 81 women with bladder pain for no longer than three years and pelvic-floor tenderness, targeted internal/external myofascial physiotherapy produced 59% global responders versus 26% with global massage at 12 weeks. Separate pain, urgency and frequency changes did not significantly differ. The regional program does not prove isolated pelvic-muscle efficacy or cure bladder disease.

Reassessment and follow-up

  • Repeat comfortable rotation range/force and the same sitting or movement task.
  • Keep external hip and pelvic-wall findings distinct.
  • Coordinate reassessment for persistent pelvic-organ or neurological symptoms rather than escalating deep pressure.

Evidence and sources

  1. University of Washington Muscle Atlas: Obturator internus

    2026 · Institutional anatomy reference

    Undated anatomy page, verified September 2026; the year records this review. Supports attachments and actions, not diagnostic accuracy of palpation or a trigger-point map. No atlas illustration reproduced.

  2. University of Washington Muscle Atlas: Superior gemellus

    2026 · Institutional anatomy reference

    Undated anatomy page, verified September 2026; the year records this review. Supports attachments and actions, not diagnostic accuracy of palpation or a trigger-point map. No atlas illustration reproduced.

  3. University of Washington Muscle Atlas: Inferior gemellus

    2026 · Institutional anatomy reference

    Undated anatomy page, verified September 2026; the year records this review. Supports attachments and actions, not diagnostic accuracy of palpation or a trigger-point map. No atlas illustration reproduced.

  4. EAU Guidelines on Chronic Pelvic Pain: Diagnostic Evaluation

    2026 · Clinical guideline

    Current online chapter verified September 2026; coordinated organ, musculoskeletal and neurological assessment, including pelvic-floor contraction/relaxation. Tenderness cannot exclude organ disease.

  5. EAU Guidelines on Chronic Pelvic Pain: Management

    2026 · Clinical guideline

    Individualized multidisciplinary care and specialist pelvic-floor treatment. Manual/needle evidence is heterogeneous; prostate-pain shockwave evidence cannot establish efficacy for a levator or obturator trigger point.

  6. Randomized multicenter clinical trial of myofascial physical therapy in women with interstitial cystitis/painful bladder syndrome and pelvic floor tenderness

    2012 · Randomized trial

    81 women with bladder-pain symptoms for no longer than three years and pelvic-floor tenderness; up to ten 60-minute sessions over 12 weeks. Global response was 59% with targeted internal/external pelvic, hip and abdominal treatment versus 26% with global massage. Separate pain, urgency and frequency changes did not differ significantly; no isolated pelvic-muscle or durable follow-up effect established.

  7. Low back pain and sciatica in over 16s: assessment and management

    2020 · Clinical guideline

    Regional back/leg assessment and active care; does not identify an individual deep hip rotator from tenderness or establish a gemelli/obturator-specific exercise dose.

  8. Physiotherapy Compared With Shockwave Therapy for the Treatment of Proximal Hamstring Tendinopathy: A Randomized Controlled Trial

    2025 · Randomized trial

    100 adults with proximal hamstring tendinopathy; physiotherapy versus shockwave with advice in both arms. No primary-outcome difference at 4, 12, 26 or 52 weeks; no sham group. This is tendon evidence, not hamstring muscle MPS evidence.

Associated Trigger Points