Singular dimple on upper thigh? (Photo)

female, 23 years old, 5’3, 115lbs I have had this dimple on my thigh for years now. When we i try to look up information about it, the only thing that comes up is cellulite but it just doesn’t look like cellulite to me. it’s very deep and strengthens when i lean to the side it’s on or “pop out my hip”. I’ve lost weight, gained weight and it stay there no matter what. Just curious as to what is causing it and how to get rid of it.