i have grains like sand underneath my skin on my face. There are a lot on my forhead, checks, all over my face. I exfoliate regularly but nothing works. My Esthetician removes some of the grains which she can with a needle and squeezes them out. i am scared that this procedure will leave marks. What can i do or what do i need (cream, product, pills), for the grains to be removed (disappear) and not come back?