I've been using tret for a month now. First week had no negative effects. Second week a bit of stinging. Noq have very stingy skin. I'm on a low dose and use the sandwich method. It's not very painful just really quite stingy for about 30 mins after using. Does this tend to go away? My skin actually looks really good and minimal flakiness. Just the tingling i want to go away as it makes it hard to fall asleep!