acne
"This stuff is AWESOME.  Admittedly it itched like fire for three days until I slacked off and used a good moisturizing cream.  But my face is CLEAR for the first time in YEARS.  I recommend Carmex to heal the dry flakes and Aveeno after that.  If you have another breakout, go back to Differin.  I can't recommend this stuff enough.  It's worth it to itch and burn for a day or two; it's WORKING.  Just deal with it.  Thank you, makers of Differin!!!  Screw makeup.  I'm FREE."