Hello. I am 26 years old. I started using tretinoin last year September. After few months I started noticing that my skin near my other undereyes started thickening. I kept using It because I thought It would get better. Finally I stop using It on March. Now my other undereyes look weird,because there Is this area of thickened skin. My other undereye Area Is completely smooth so I'm not sure why this happened only on one side, or did I apply It unevenly. Can CO2 laser help to smooth the line/texture between The thickened skin and "normal" skin? It's on The right side of My face in these pictures. Before using tretinoin My undereyes were completely smooth.I didn't put It straight under my eyes,but I put It on my nasolabial folds And cheeks. English Is not My first language so I hope you understand.