I'm 15, very fit and athletic, but I have a bit of cellulite on the back of my legs?

I'm 15 years old. I'm 5'11" and I weigh 140 pounds - I'm very healthy weight. I exercise every day, be it through daily basketball practice, basketball games, or through running around in my neighborhood. I do eat a lot, but I have a very high metabolism. In the past couple of months, I've noticed a few bumps and dimples on the backs of my legs. They're barely noticeable, but I can tell that they're present especially when I cross my legs, and it bugs me. I was just wondering how I can make these dimples go away/the most effective way to make them fade away a little bit. I obviously don't want surgery or anything of the sort because this cellulite is barely even present. Still, I don't really understand why I have it because while many larger girls I know don't have any cellulite at all, I'm very skinny and athletic and I have it. My thighs are still really smooth, but just knowing that I have a little bit of cellulite lurking there annoys me, and it can be a bit more visible at times. Is there any way I can make this better?