A stress fracture is a tiny crack in the bone from chronic overuse. Most stress fractures occur in the lower leg and foot. They can also occur in the hip and other areas.
A blow to the bone does not cause a stress fracture. Rather, it is typically caused by repeated stress or overuse. Some causes are:
Increasing the amount or intensity of an activity too quickly (most common)
Switching to a different playing or running surface
Wearing improper or old shoes
Stress fractures can worsen by continued physical stress. Smoking can also make stress fractures worse because it interferes with bone healing.
A risk factor is something that increases your chance of getting a disease or condition. Risk factors for a stress fracture include:
Sex: female
Certain sports, especially involving jumping or running:
Tennis
Track, especially distance running
Gymnastics
Dance
Basketball
Amenorrhea (women only)
Reduced bone thickness or density
Poor muscle strength or flexibility
Overweight or underweight
Poor physical condition
Symptoms include:
Localized pain on the bone
Pain when pressure is applied directly over the fracture and the area around it
Pain when putting stress on the affected leg
Swelling and warmth at injury site
The doctor will ask about your symptoms and medical history, and examine the injured area for localized pain and swelling.
Tests may include:
X-ray —to look for a break in the bone
Stress fractures are very tiny and usually not seen on an x-ray until at least two weeks after symptoms begin.
MRI scan —to look for swelling and inflammation inside the bone
Bone scan —to look for evidence of a stress fracture
You may need to see a physical therapist to learn how to use crutches so you can keep weight off your foot. Sometimes a brace or cast is used for a short time to aid healing. Once you are out of the cast and off crutches, your physical therapist can prescribe an exercise routine to allow you a gradual return to normal activities.
To reduce your chance of getting a stress fracture:
Wear proper footwear.
Run on a softer surface, such as grass, dirt, or certain outdoor tracks.
Gradually increase the amount and intensity of an activity.
Do not overdo any activity.
Weight reduction can reduce stress on the bones
Avoid smoking.
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