A femoral stress fracture is a bone stress injury in the thigh bone that develops when repeated loading outpaces the bone’s ability to recover. It often causes gradually worsening hip, groin, or upper thigh pain, especially with running, hopping, stairs, or longer walks. For a broader overview of stress fractures, see our main guide.

These injuries need early attention. While some femoral stress fractures settle well with prompt offloading and a structured rehabilitation plan, others carry a higher risk of worsening if you keep training through pain. If your symptoms are centred around the hip or groin, our groin pain guide and hip and butt pain overview may also help you compare related causes.

What Is a Femoral Stress Fracture?

A femoral stress fracture is a small crack or bone stress injury in the femur caused by repeated impact or loading rather than one major accident. It most often affects active people such as runners, field-sport athletes, military recruits, and people who increase training too quickly. The femoral neck, which sits just below the hip joint, is the most important area to assess because some femoral neck stress injuries can become unstable if missed.

Common Femoral Stress Fracture Symptoms

Femoral stress fracture symptoms usually build gradually rather than appearing all at once. Pain often starts during running or exercise, then lingers afterwards. As the injury progresses, pain may come on earlier in a session, during walking, or even at rest.

• Deep groin, hip, or upper thigh pain
• Pain with running, hopping, stairs, or single-leg loading
• A limp after activity or during longer walks
• Pain that settles with rest, then returns quickly when you reload
• Night pain or weight-bearing pain in more irritable cases

Because these symptoms can overlap with hip injury, hip flexor pain, or hip impingement, diagnosis matters.

Why Does a Femoral Stress Fracture Hurt With Loading?

A femoral stress fracture usually hurts with loading because repeated impact irritates a weakened area of bone. Pain often feels deeper than a muscle strain and usually worsens with running, hopping, stairs, or prolonged walking rather than easing once you warm up.

What Causes a Femoral Stress Fracture?

Most femoral stress fractures develop when bone loading increases faster than the body can adapt. That often happens with a sudden jump in running volume, pace, hills, sport frequency, or cross-training load. Poor recovery, low energy availability, low bone density, and biomechanical overload can increase the risk further.

• Rapid increase in running distance, speed, or hill work
• High weekly impact volume without enough recovery
• Returning to sport too quickly after time off
• Low calorie intake relative to training demand
• Menstrual dysfunction or hormonal issues
• Low vitamin D or poor bone health
• Previous bone stress injury
• Changes in footwear, surface, or training program

How Is a Femoral Stress Fracture Diagnosed?

A physiotherapist or doctor will look at your symptom pattern, loading history, pain location, and how the hip tolerates weight-bearing tasks. Pain with hopping, jogging, or single-leg loading can raise suspicion, but imaging is usually needed to confirm the diagnosis and assess risk level.

X-rays may look normal early on. If symptoms and examination suggest a bone stress injury, MRI is often the most useful imaging test because it can detect earlier bone stress changes and help show how severe the injury is. This is especially important when femoral neck stress fracture is suspected.

When Should You Seek Help for a Femoral Stress Fracture?

A femoral stress fracture needs prompt review if pain is causing a limp, hurting during walking, or becoming painful at night. These features can point to a more significant bone stress injury that should not be pushed through.

How Do You Treat a Femoral Stress Fracture?

Femoral stress fracture treatment depends on the exact site and severity. Early management usually focuses on reducing bone load, settling pain, and protecting the bone while it starts to heal. That may include stopping running, modifying work or sport, and sometimes using crutches if walking is painful.

Physiotherapy can help by guiding load reduction, maintaining general strength, improving movement control, and building a staged return-to-running or return-to-sport plan. If a higher-risk femoral neck stress fracture is present, medical and orthopaedic review may also be needed.

• Temporarily stop painful running and impact work
• Use crutches or offload if walking is painful
• Address strength, control, and loading errors
• Screen bone health, nutrition, and recovery factors
• Progress back to walking, then impact, then running in stages

Recovery and Return to Running

Recovery time varies. Lower-grade bone stress injuries generally recover faster than more established fractures, while higher-risk femoral neck injuries often need a slower and more cautious return. A staged plan is important because pain may ease before the bone is ready for full impact.

Return to running usually starts only when walking is comfortable, hopping is appropriate, and your clinician is satisfied with your progress. If you are dealing with broader running-related overload, our tibial stress fracture guide, foot stress fracture page, and running injuries guide may also be useful comparisons.

How Long Does a Femoral Stress Fracture Take to Heal?

Femoral stress fracture recovery time varies with the site, severity, and how quickly you reduce painful load. Lower-grade injuries may settle over weeks, while higher-risk femoral neck stress injuries often need a slower and more cautious return to walking, exercise, and running.

How to Help Prevent Another Femoral Stress Fracture

Prevention centres on smarter load progression and better recovery. Gradual training changes, adequate nutrition, strong hip and trunk control, and early action when pain appears all help reduce repeat bone stress problems.

• Increase running load gradually
• Build recovery days into the week
• Support bone health with adequate nutrition
• Address persistent hip, groin, or thigh pain early
• Use strength work to improve load tolerance
• Return from injury with a staged program, not a jump back

If your hip or groin pain is not improving, a structured assessment can identify whether the issue is bone, joint, tendon, or muscle related and guide the right next step.

Related Conditions

• Stress Fractures
• Groin Pain
• Hip Impingement
• Hip Flexor Pain
• Foot Stress Fracture
• Tibial Stress Fracture

Femoral Stress Fracture FAQs

What is a femoral stress fracture?

A femoral stress fracture is a bone stress injury in the thigh bone caused by repeated loading. It often develops gradually and commonly causes hip, groin, or upper thigh pain during running, hopping, or walking. Early diagnosis matters because some femoral neck stress injuries carry a higher risk than other stress fractures.

What causes a femoral stress fracture?

Femoral stress fracture usually happens when training load rises faster than the bone can adapt. Common contributors include rapid increases in running, poor recovery, low energy availability, low vitamin D, previous stress fracture history, or reduced bone health.

How do you treat a femoral stress fracture?

Femoral stress fracture treatment usually starts with reducing painful load, stopping impact activity, and sometimes using crutches if walking hurts. Physiotherapy then helps guide strength, movement, and a staged return to exercise. Higher-risk femoral neck injuries may need specialist review.

Is a femoral stress fracture the same as a hip flexor strain?

No. A femoral stress fracture affects bone, while a hip flexor strain affects muscle or tendon. Both can cause groin pain, but bone stress pain often worsens with repeated loading and may become painful with walking, hopping, or night-time symptoms.

How long does femoral stress fracture recovery take?

Femoral stress fracture recovery time varies with the site, grade, and how early you reduce load. Some lower-grade injuries improve over weeks, while higher-risk injuries can take much longer. A safe return to running depends on symptoms, function, and imaging or medical guidance where needed.

When should you seek help for a femoral stress fracture?

Seek help promptly if you have hip or groin pain that is worsening, causing a limp, stopping you from running, or becoming painful with walking or at night. These signs can point to a more significant femoral stress fracture that should not be ignored.

What to Do Next

If you have exercise-related hip, groin, or upper thigh pain that keeps returning, do not keep loading it and hope it settles. A femoral stress fracture can worsen if it is missed, especially when the femoral neck is involved.

Book a musculoskeletal physiotherapy assessment or find your nearest PhysioWorks clinic. Early assessment helps clarify the diagnosis, guide imaging if needed, and map out the safest recovery plan.

References

1. Schroeder JD, Tenforde AS, Varacallo M. Bone Stress Injuries: Diagnosis and Management. PM&R. 2024.
2. Yang K, Hemmings S, Tsoi K, et al. Femoral neck stress fracture return to activity and the effect of metabolic dysfunction and surgical management on long-term outcomes. BMJ Open Sport Exerc Med. 2023.
3. Robertson GAJ, Wood AM. Femoral Neck Stress Fractures in Sport: A Current Concepts Review. Sports Med Int Open. 2017.
4. Hoenig T, Eirale C, Ekenros L, et al. International Delphi consensus on bone stress injuries in athletes. Br J Sports Med. 2025.