Overview
A femur fracture is a break in the thigh bone (femur), which is one of the strongest bones in the body. It may occur near the hip (femoral neck or intertrochanteric region) or along the shaft of the femur. Because the bone is load-bearing, a fracture can cause significant pain, weakness, and difficulty walking, and it can also affect the nearby hip joint and blood supply. The exact treatment approach depends on the fracture location, alignment, and stability, and many cases require prompt medical assessment even when surgery is not the main option.
Symptoms
Femur fracture pain is usually felt in the hip, upper thigh, or groin, and it often becomes much worse with standing or any attempt to move the leg. Many people have trouble bearing weight, notice swelling and bruising, and may hold the leg still to avoid pain. If the fracture is displaced, there can be visible deformity or leg shortening, and range of motion of the hip may be very limited. Some patients also experience numbness, tingling, or weakness if nerves or blood vessels are affected.
Causes
Femur fractures most often result from a significant fall or high-energy trauma such as a motor vehicle crash. In older adults, weaker bones from osteoporosis can lead to fractures from low-energy falls. Less commonly, femur fractures can occur due to tumors (pathologic fracture) or from repetitive stress when the bone cannot fully repair itself.
Risk Factors
Risk increases with age, especially after menopause due to bone loss, and with conditions that weaken bone such as osteoporosis or long-term steroid use. Falls are a major trigger, so vision problems, poor balance, and muscle weakness raise risk. High-energy accidents and participation in activities with high impact can also increase the likelihood of traumatic femur fractures.
Prevention
To help prevent fractures, focus on fall reduction with good lighting, removing tripping hazards, and using appropriate footwear, and address balance or medication side effects that increase fall risk. Maintaining bone health through adequate calcium and vitamin D intake, regular weight-bearing and strengthening exercise, and osteoporosis screening and treatment when appropriate can reduce fragility fractures. Using protective gear in high-risk activities and following safe lifting and activity mechanics can also lower the chance of traumatic injury.
How the Diagnosis Is Evaluated
Clinicians start with a history of the injury, how it happened, and the patient's ability to bear weight, followed by an exam that checks pain location, leg alignment, and skin integrity. They also assess circulation and nerve function in the foot and leg to ensure there is no compromise. Imaging usually begins with X-rays, while CT may be used for complex fractures or to better define alignment, and MRI can help detect stress or occult fractures that are not visible on initial X-rays. Not every test is needed for every patient, but the goal is to confirm the fracture and determine stability.
Nonsurgical Treatment Options
Non-surgical care focuses on pain control, protecting the fracture while it heals, and maintaining safe mobility. Depending on fracture type and stability, treatment may include immobilization with bracing and/or traction, limited or protected weight bearing with crutches or a walker, and close follow-up with repeat imaging to confirm alignment. Pain is typically managed with acetaminophen and/or carefully selected anti-inflammatory medicines, along with short-term stronger pain relief when needed under medical supervision. A structured physical therapy program can help preserve hip and leg strength, prevent stiffness, and improve gait and balance as healing progresses. Because femur fractures significantly increase risk of blood clots and deconditioning, clinicians may also recommend measures such as early mobilization within safe limits and individualized plans to reduce clot risk.
When to Seek Medical Attention
Seek urgent medical attention after any significant fall or impact if you cannot bear weight, have severe hip or thigh pain, or notice deformity, shortening, or rapidly increasing swelling. Go to the emergency department right away for an open wound over the suspected fracture, fever with worsening pain, or signs of nerve or blood-flow problems such as numbness, new weakness, or a foot that becomes cold or pale. Prompt evaluation is also needed if pain is not improving, you develop chest pain or shortness of breath (possible clot-related symptoms), or swelling becomes severe.
Frequently Asked Questions
Some femur fractures can heal with non-surgical management when they are stable and well-aligned, but this must be determined by imaging and exam.
Limit movement, avoid putting weight on the leg if advised, and keep the leg supported; do not attempt to "test" the injury by walking.
Next Steps
If you suspect a femur fracture, avoid weight bearing and get medical evaluation as soon as possible, especially after a fall or high-impact injury. After imaging, ask your clinician which fracture type you have and whether non-surgical options like bracing, traction, or protected weight bearing are appropriate for stability and alignment. Follow the prescribed rehabilitation plan and return for reassessment if pain or function worsens.