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1 · SNAPSHOT

Iliopsoas-Related Pain / Internal Snapping Hip body chart — Illustrative, not diagnostic. Canva body chart for Iliopsoas-Related Pain / Internal Snapping Hip.

Who: Kicking and sprinting athletes. Also dancers and anyone doing high-volume loaded hip flexion.
What: Iliopsoas-related groin pain, one of the four Doha entities — with or without internal snapping.
How it behaves: Anterior groin ache after kicking or sprinting. Worse with hip flexion and sit-ups. Clicking or snapping possible. Eased by relative rest. Often coexists with adductor and abdominal patterns.

The one thing to take from this page:

"Tight hip flexor" is usually a weak one. Restore load tolerance, not just flexibility — and if it snaps painlessly, treat nothing.

Two problems wearing one name

	What it is	What you do
Iliopsoas-related pain	Tender deep to the inguinal ligament + painful resisted hip flexion	Treat it — load tolerance
Painful internal snapping	A snap that hurts	Treat the pain and the control, not the noise
Painless internal snapping	A snap that doesn't hurt	Treat nothing. It's noise

⚠️ Read the surgical literature carefully. Almost all of it studies iliopsoas impingement after hip replacement, or tenotomy during hip arthroscopy. That is not the athlete in front of you.

2 · SE — THE SUBJECTIVE PATTERN (the 70%)

Five stages, in your course's order. Ask about the snap separately from the pain — they are different questions.

MAIN PROBLEM

"Deep in the front of my hip after kicking."
"It clicks when I lift my leg."
"Sit-ups are the worst."

BODY CHART

Deep anterior, at or below the inguinal ligament.
Mark the adductor origin, the symphysis and the inguinal canal too — the other three Doha entities.
Mark the lesser trochanter region.
Below the knee, or into the anterior thigh with numbness? That is a femoral nerve question.

BEHAVIOUR

	Fits iliopsoas-related	Points elsewhere
Aggs	Kicking, sprinting, hip flexion, sit-ups	Cutting with adductor tenderness → adductor-related
Snap	With active flexion/extension	Lateral snap over the greater trochanter → external snapping hip
Eases	Relative rest	Nothing eases it, constant → screen
Severity	VAS 0–10 at best / at worst / right now	—
Systemic	None	Fever, unwell, night sweats → abscess
Weight-bearing	Able	Can't hop → bone stress

HISTORY

Kicking or sprinting volume, and what changed.
Does it snap, does the snap hurt, and does it snap when nothing hurts? Three separate questions.
Sit-up and core programme volume.
Previous hip surgery — arthroscopy or replacement? This is the one history question that changes the whole page.
Any anticoagulation, recent procedure, or bleeding disorder?

SPECIAL / SCREENING QUESTIONS

Fever, feeling unwell, night sweats, recent infection?
Any weakness in the quadriceps, or numbness over the anterior thigh? Femoral nerve.
Can they weight-bear and hop?
Any immunosuppression, diabetes, or intravenous drug use?

Assessing this region? Download the Hip & Groin assessment template →

3 · HYPOTHESIS RANKING

Competing pattern	The one discriminating feature
Adductor-related groin pain	Tender adductor origin, positive squeeze. Frequently coexists.
Inguinal-related groin pain	Tender pubic tubercle, conjoint tendon or canal; pain on cough and resisted sit-up.
Hip-related pain (FAI, labral)	Deep pinch with FADIR, reduced IR in flexion. The joint.
External snapping hip	The snap is lateral, over the greater trochanter — a different structure and a different page.
Femoral neck stress fracture	Weight-bearing pain, unable to hop, RED-S profile.

The one that outranks everything

Non-musculoskeletal iliopsoas pathology. The deep anterior hip is also the address for:

Iliopsoas abscess — fever, systemic illness, immunosuppression, diabetes, intravenous drug use [1][2].
Septic iliopsoas bursitis [3].
Iliopsoas haematoma with femoral nerve palsy — anticoagulation, a bleeding disorder, or trauma, with quadriceps weakness and anterior thigh numbness [4].

These three are why this page carries red flags.

4 · RED FLAGS — DON'T MISS THIS

This section is free, on every pattern, forever. Safety is never gated.

Finding	What it suggests	What you do
Fever, unwell, night sweats with hip flexion pain	Iliopsoas abscess	Urgent medical review
Immunosuppression, diabetes, IV drug use, recent infection	Abscess, septic bursitis	Medical review
Quadriceps weakness with anterior thigh numbness	Iliopsoas haematoma with femoral nerve palsy	Urgent medical review
Anticoagulation or bleeding disorder with new deep hip pain	Haematoma	Urgent medical review
Hot, swollen, exquisitely painful hip	Septic arthritis	EMERGENCY
Unable to weight-bear or hop	Femoral neck stress fracture	Urgent imaging
Night pain or rest pain, weight loss	Malignancy, infection	Medical review
Progressive weakness	Neurological cause	Urgent medical review

The rule: load-related anterior groin pain that hurts on resisted hip flexion, in a systemically well athlete who can hop, is yours. Fever, anticoagulation, quadriceps weakness or an inability to weight-bear is not.

Cross-links: Adductor-related groin pain · Athletic pubalgia / inguinal-related · Femoroacetabular impingement · Hip / pelvic stress fracture

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Guideline anchor

No treatment guideline exists.

Anchored to the Doha agreement (Weir et al. 2015, PMID 26031643), which names iliopsoas-related groin pain as one of four defined clinical entities and supplies the examination, and to the consensus on hip-related pain (Reiman et al. 2020, PMID 31959678) for where the joint sits alongside it.

PubMed Source

The Doha agreement is terminology and definitions, not treatment. And be careful with the surgical literature here: almost all of it studies iliopsoas impingement after hip arthroplasty or tenotomy during hip arthroscopy. It is not evidence about the athlete in front of you.

Members

The evidence summary is for members

Verified diagnostic accuracy, where the evidence stands and what it doesn't settle. Free with an account.

Sources · 20

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Every source on this page resolves and title-verifies against PubMed. Newest first.

2026Armenta-Flores et al. (2026). Iliopsoas Abscess: A Narrative Review. World journal of surgery, 50(2), 336-343. https://doi.org/10.1002/wjs.70213
2026Cheng et al. (2026). Therapeutic strategies for and clinical outcomes in iliopsoas muscle abscess: A systematic review and meta-analysis. Journal of microbiology, immunology, and infection = Wei mian yu gan ran za zhi. https://doi.org/10.1016/j.jmii.2026.07.011
2025Saha et al. (2025). Septic and Aseptic Iliopsoas Bursitis - A Systematic Review of the Literature. Ortopedia, traumatologia, rehabilitacja, 27(1), 1-8. https://doi.org/10.5604/01.3001.0055.1540
2023Guild et al. (2023). The epidemiology and management of iliopsoas hematoma with femoral nerve palsy: A descriptive systematic review of 174 cases. Injury, 54(2), 280-287. https://doi.org/10.1016/j.injury.2022.11.057
2025Vandeputte et al. (2025). Evaluation of Clinical Tests to Diagnose Iliopsoas Tendinopathy. Clinical orthopaedics and related research, 483(11), 2123-2132. https://doi.org/10.1097/CORR.0000000000003520
2022Lin et al. (2022). Multiple iliopsoas tendons: a cadaveric study and treatment implications for internal snapping hip syndrome. Archives of orthopaedic and trauma surgery, 142(6), 1147-1154. https://doi.org/10.1007/s00402-021-04009-5
2025Katz et al. (2025). Iliopsoas Injections: A Systematic Review of Patient Outcomes and Progression to Surgery. JBJS reviews, 13(1). https://doi.org/10.2106/JBJS.RVW.24.00162
2021Longstaffe et al. (2021). Iliopsoas Release: A Systematic Review of Clinical Efficacy and Associated Complications. Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine, 31(6), 522-529. https://doi.org/10.1097/JSM.0000000000000784
2021Gouveia et al. (2021). Iliopsoas Tenotomy During Hip Arthroscopy: A Systematic Review of Postoperative Outcomes. The American journal of sports medicine, 49(3), 817-829. https://doi.org/10.1177/0363546520922551
2022Coulomb et al. (2022). Arthroscopic iliopsoas tenotomies: a systematic review of surgical technique and outcomes. Hip international : the journal of clinical and experimental research on hip pathology and therapy, 32(1), 4-11. https://doi.org/10.1177/1120700020970519
2024Baur et al. (2024). The role of iliopsoas fractional lengthening in hip arthroscopy: a systematic review. Journal of hip preservation surgery, 11(1), 67-79. https://doi.org/10.1093/jhps/hnad039
2026Nho et al. (2026). Editorial Commentary: Balancing Pain Relief and Function With Iliopsoas Tendon Treatment and Concomitant Hip Arthroscopy for the Internal Snapping Hip. Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association, 42(2), 452-454. https://doi.org/10.1002/arj.70101
2023Verhaegen et al. (2023). Risk Factors for Iliopsoas Tendinopathy After Anterior Approach Total Hip Arthroplasty. The Journal of arthroplasty, 38(3), 511-518. https://doi.org/10.1016/j.arth.2022.10.015
2025Minelli et al. (2025). Risk Factors for Iliopsoas Impingement Following Total Hip Arthroplasty: A Systematic Review. Journal of clinical medicine, 14(18). https://doi.org/10.3390/jcm14186376
2021Campbell et al. (2021). The incidence and pattern of iliopsoas tendinitis following hip arthroscopy. Hip international : the journal of clinical and experimental research on hip pathology and therapy, 31(4), 542-547. https://doi.org/10.1177/1120700020908845
2015Weir et al. (2015). Doha agreement meeting on terminology and definitions in groin pain in athletes. British journal of sports medicine, 49(12), 768-74. https://doi.org/10.1136/bjsports-2015-094869
2020Reiman et al. (2020). Consensus recommendations on the classification, definition and diagnostic criteria of hip-related pain in young and middle-aged active adults from the International Hip-related Pain Research Network, Zurich 2018. British journal of sports medicine, 54(11), 631-641. https://doi.org/10.1136/bjsports-2019-101453
2021Dempsey et al. (2021). Nomenclature for groin pain in athletes. The British journal of radiology, 94(1126), 20201333. https://doi.org/10.1259/bjr.20201333
2025Banke et al. (2025). [Iliopsoas impingement]. Schmerz (Berlin, Germany), 39(6), 449-461. https://doi.org/10.1007/s00482-025-00910-9
2026Hao et al. (2026). The area and width of the gluteus maximus, gluteus medius/minimus and iliopsoas muscles are associated with the two-year prognosis of patients undergoing hip arthroscopy for femoroacetabular impingement syndrome. BMC musculoskeletal disorders, 27(1). https://doi.org/10.1186/s12891-026-10096-5

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