When we think of an acne scar, it’s like a dent in the skin like a chicken pox mark. This is caused by severe cystic acne and when that heals a lot of the time it forms that deep scar. A postacne mark is really totally different the skin is still smooth. But what’s happened is that the inflammation of the acne causes the inflammatory response which causes your melanocytes, the cells that produce pigment, to be appearing there. So think of a post acne mark the way you would think of a sunburn. You get a sunburn with.