A Pulled Groin
SaveGroin strains are common in sports with sudden sprints and direction changes, but not all inner-thigh or groin pain is a pulled muscle — a hip joint problem can mimic it. This guide covers grading severity, telling a strain from a hip issue, and returning to sport without a relapse.
Last updated: July 2026
What a groin strain is
A groin strain, also called an adductor strain, is a tear in one of the muscles that pull the leg inward, most often where the muscle meets its tendon near the pubic bone. It causes sharp or aching pain in the inner thigh or groin that flares with sprinting, cutting, kicking, or bringing the legs together against resistance.
The adductor longus is the most commonly injured muscle in the group, and pain typically sits high on the inner thigh, just below the groin crease. Depending on severity, there may be swelling, bruising that shows up a day or two later, and, in more serious tears, a palpable gap or divot in the muscle.
How it happens
Groin strains happen when the adductor muscles are stretched or forcefully contracted beyond what the tissue can handle, usually during an explosive movement — a sudden sprint, a hard change of direction, a mistimed kick, or an overstretched lunge. Sports with rapid acceleration and cutting, such as soccer, hockey, and football, account for a large share of cases.
Risk climbs with a history of prior groin strain, limited hip range of motion, weaker adductor strength relative to the muscles on the outside of the hip, and inadequate warm-up before high-intensity activity. Preseason and early-season weeks, when conditioning lags behind game intensity, are a well-known high-risk window.
How severe is it?
Clinicians grade muscle strains from mild to severe based on how much tissue is torn and how much function is lost, and the grade is what actually predicts recovery time — not how dramatic the injury felt in the moment. A grade 1 strain is a mild overstretch with little strength loss; a grade 3 is a complete tear.
| Grade | What's torn | Typical picture |
|---|---|---|
| 1 (mild) | A few muscle fibers | Soreness, little strength loss, can usually keep walking |
| 2 (moderate) | A partial tear | Noticeable pain, swelling, a limp, weaker resisted adduction |
| 3 (severe) | A complete tear | Sudden sharp pain, often a pop, significant weakness, possible gap in the muscle |
Even a grade 1 strain is worth taking seriously in the first week, since continuing to sprint or kick through it is one of the more common ways a mild strain turns into a more serious, slower-healing one.
Groin strain, or something in the hip joint itself?
Not all groin pain is a pulled muscle. Pain that is deep in the groin, worsens with prolonged sitting or getting out of a car, or comes on with stiffness rather than a clear moment of injury points more toward the hip joint itself — hip osteoarthritis or femoroacetabular impingement — rather than a strained adductor 1Ref 1American Academy of Orthopaedic Surgeons (OrthoInfo) (2024).Osteoarthritis of the Hip.Hip osteoarthritis causes progressive groin and hip pain and stiffness that builds gradually rather than from a single injury, distinguishing it from a muscle strain..
Hip joint pain tends to build gradually, without a single tearing moment, and often includes a pinching sensation with deep hip flexion, such as squatting or pulling the knee toward the chest. When the joint rather than the muscle is the likely source, clinicians may track function over time with a hip-specific tool such as the HOOS, a validated questionnaire covering pain, stiffness, and daily function 2Ref 2Nilsdotter AK, Lohmander LS, Klässbo M, Roos EM (2003).Hip disability and osteoarthritis outcome score (HOOS)—validity and responsiveness in total hip replacement.The HOOS is a validated patient-reported outcome measure covering pain, symptoms, daily function, sport/recreation, and hip-related quality of life, used to track hip joint conditions over time.. A hip flexor strain is a separate injury again, sitting slightly higher and to the front of the joint, and it hurts more with resisted hip flexion than with resisted adduction.
Do you need imaging?
Usually not right away. Most groin strains are diagnosed clinically, from the story of how the injury happened and an exam that reproduces pain with resisted adduction or a stretch of the muscle. Imaging is reserved for severe injuries where a complete tear or bony avulsion is suspected, for pain that doesn't fit the muscle-strain pattern, or for symptoms that persist well beyond the expected healing window.
Ultrasound can show the size and location of a tear and is often the first choice because it's quick and dynamic; MRI gives a more detailed picture and is typically reserved for higher-grade injuries or when surgery is being considered. For most mild-to-moderate strains, imaging changes little about the initial plan.
What helps
Early management follows the same principle as most muscle strains: protect the tissue briefly, then load it again as soon as pain allows, rather than resting for weeks. Relative rest, ice, and compression in the first few days ease pain and swelling, followed by a gradual, structured return through stretching, isometric holds, and progressive strengthening of the adductors.
Rushing back to sprinting, cutting, or kicking before strength and pain-free range of motion have returned is the most common way a groin strain becomes a recurring one, the same pattern seen when calf strain recovery is rushed and running resumes too soon. A sports medicine clinician or physical therapist can help sequence that return, typically progressing from straight-line jogging to change-of-direction drills to full-speed, sport-specific movement before clearance to play.
Tracking recovery and when to get it checked
Most groin strains improve steadily over two to eight weeks depending on grade, with mild strains often resolving in one to two weeks and severe tears taking two to three months or longer. Pain that plateaus rather than trending down, or that flares again each time activity resumes, is worth a fresh evaluation rather than more rest alone.
A few features point beyond a simple strain: pain that is felt more at the inner knee than the groin may be a different injury, such as an MCL sprain, rather than an adductor problem. Numbness, significant swelling that spreads down the leg, inability to bear weight, or groin pain following a fall in an older adult are reasons to be seen rather than to wait it out.
Common questions
Related
Muscle, joint & pain
A Strained Hip FlexorMuscle, joint & pain
The Hip Labral Tear and the Deep CatchMuscle, joint & pain
Hip Arthritis and the Groin Ache
Say it back
How would you explain this to someone you love?
Two or three sentences, just as you’d say it. Gale reflects back what you focused on — a mirror, not a quiz.
When groin pain needs more than rest
- —A sudden pop with significant weakness or an inability to bear weight, suggesting a complete tear
- —Groin or hip pain in an older adult following a fall, which can signal a hip fracture
- —Numbness, significant swelling spreading down the leg, or the leg turning pale or cold
- —Groin pain that plateaus or worsens despite several weeks of a genuine rehabilitation program
Inability to bear weight after a fall, or a leg that becomes numb, pale, or cold, warrants prompt in-person or emergency evaluation.
This guide is general health education, not medical advice, and it cannot diagnose the cause of your groin or hip pain. A clinician who can examine you should guide evaluation and treatment.
References
- 1.American Academy of Orthopaedic Surgeons (OrthoInfo) (2024). Osteoarthritis of the Hip. OrthoInfo — AAOS. link ✓Hip osteoarthritis causes progressive groin and hip pain and stiffness that builds gradually rather than from a single injury, distinguishing it from a muscle strain.
- 2.Nilsdotter AK, Lohmander LS, Klässbo M, Roos EM (2003). Hip disability and osteoarthritis outcome score (HOOS)—validity and responsiveness in total hip replacement. BMC Musculoskeletal Disorders. PMID 12777182 ✓The HOOS is a validated patient-reported outcome measure covering pain, symptoms, daily function, sport/recreation, and hip-related quality of life, used to track hip joint conditions over time.
2 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — every citation independently verified. Editorial policy