Originally Posted by
joypulv
You are a minor so what have your parents said?
My first concern would be where you run. If not on a track specifically for running, you are bound for trouble. Most roads, for instance, are sloped down on the sides and runners are jarring their entire body from the uneven height when each foot hits the ground.
Other than that, there are too many possible reasons. Sports related would be considered first unless you show other symptoms, such as around the appendix, ovary, femoral canal (hernia), etc.
It would seem prudent to me to quit strenuous sports to see if this goes away with warm baths and heating pads and something gentle for exercise, like swimming but not in competition.
Your parents should take you to a doctor, don't you agree?