A stress fracture is an injury to a bone caused by repeated stress to that bone. There are two types of stress fractures. 

  • A “fatigue” stress fracture is when a healthy bone sustains abnormal stress and partially breaks.
  • An “insufficiency” stress fracture is when a bone that has been weakened by disease partially breaks under normal stress.

Fatigue stress fractures are the most common type of stress fracture seen in active children and teens.