Dark inner thighs. Is there a surgery that can help? (Photo)

I have been struggling with dark inner thighs for a long time. I was overweight at 13yrs (152lbs) which caused dark inner thighs, dark underarm and dark neck. 13 years later the areas have lighten a bit as a result of being at normal weight, and up keeping a healthy lifestyle. However, I'm really self conscious about my dark inner thighs. I tried home remedies and products on the market. Nothing works. Is there a surgery that can help?