A few days ago, I accidentally popped a pimple. I might have been too rough with the paper towel, because in addition to my acne wound, the skin around it (a good half inch out) turned red. I thought it was just irritation and the redness would go away, but as the acne started scabbing, the red skin around it turned into a dark brown and the skin became tough to touch. I've never had this happen before- is the toughness/darker color permanent? Is there any way I can treat it?