When I was working the graveyard shift (midnight to 8am) I noticed I was getting dark bags under my eyes and wrinkles on the side of my eyes and on my forehead. I was getting enough sleep (6-10 hours at a time) but the hours were too far off from normal. I did that shift for 10 months and noticed the wrinkles and rings after the first 3 or 4 months. Now, 6 months after my last graveyard shift, the wrinkles are gone as well as the dark cirlces and bags. Maybe your stress level is different or your sleep schedule is off.