I've only recently been looking around the internet for help on this problem, and I'm surprised that there is no definite answer on it, but I had seen someone say applying lemon juice helped. Because of this I've applied it three times a day, once in the morning, afternoon, and evening. It helps, but I don't think that it is actually healing my lips, only covering the problem.
I'm pretty sure my problem is simply stemming from a series of extremely bad sunburns I had when I was between the ages of 7 and 10, but who knows if I'm right. Are there any common vitamins (over the counter at say, WalMart or my local drugstore) that I can find that will probably help heal the skin?