When I was in the fourth grade my left hip hurt so bad I could not stand on it or move it. I went to the hospital and I stayed there for three days, while there I had a CAT scan, MRI, and two blood tests, and the doctors still couldn't figure out what was wrong. Every time I exercised I would notice it would start to hurt during, the pain goes away after only a few minutes of staying off of it. I am in the ninth grade and have noticed the pain stays longer and is more intense. If I take advil right before doing exercise then I feel the pain sometimes, but I prefer not to take the advil if it is not nessacary. Please can someone tell me some way of getting rid of the pain for good or what this is. Thank you for reading this.