Accutane and cold weather

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I know youre suposed to try and stay out of the sun while on the stuff and I do but, what about the cold weather? It's starting to get pretty chilly outside here and I was just wondering since they say that your skins supposed to be really sensitive that if this could also be a preoblem? The only effect I've noticed are the ones that usually happen to everyone while in the cold weather, dry lips, dry face, except mine are worse.(my lips hurt so much that I could barely put on chapstick when I got back inside.)