A stress fracture occurs when a bone breaks (fractures) due to repetitive trauma seen in sports such as running or daily activity such as walking. We see stress fractures in all age groups from teenage athletes to the elderly, and any age in between. Almost any bone may develop a stress fracture. Common areas where stress fractures occur include the foot, the hip, the pelvis and the tibia (lower leg) bone. Proper workup and evaluation is needed to diagnose a stress fracture and be sure it does not move out of place. Most require simple immobilization and limited weight bearing to allow the bone to heal but occasionally a stress fracture requires surgery to assure that it does not break through completely.