when we think of an acne scar, it’s like adent in the skin like a chicken pox mark. this is caused by severe cystic acne and whenthat heals a lot of the time it forms that deep scar. a post-acne mark is really totallydifferent — the skin is still smooth. but what’s happened is that the inflammation ofthe acne causes the inflammatory response which causes your melanocytes, the cells thatproduce pigment, to be appearing there. so think of a post acne mark the way you wouldthink of a sunburn. you get a sunburn with inflammation and then you get a tan, but that’sall over your whole face. but in this case it just happens where you have the pimple.