A stress fracture is an overuse use injury resulting from repetitive submaximal forces that are directed to weight bearing bones. These types of injuries occur when the stress to that area increases too quickly before the bone has a chance to adapt to changes. The bone weakens and pain develops. Lower leg and foot stress fractures are common among runners; often occur in the Tibia or Fibula, the two bones of the lower leg. Those suffering from a stress fracture usually experience pain after activity that can progress to pain during activity. More advanced cases my present with pain during inactivity and/or at night. There are many contributing factors to this injury and if you suspect you may be suffering from a Tibia/Fibula stress fracture discontinue activity and consult your primary care provider or for more specialized care please contact Children’s Sports Medicine.