Well this is embarrassing but i really can't find anything on this on the internet. But i have like two stains on my butt cheeks, that form almost a circle. I don't know WHERE i got them from and only noticed them recently but they're really bothering me... 

I thought it may be from sweat (I sweat a lot) (Gross i know) but I've been trying loads of creams that lighten up the skin and they just wont go away, i feel self conscious when in bed with my boyfriend because of them. Does anyone know a solution or some way i could rid of them and as well what there are exactly? 

Please help!!