Re: corners of mouth won't heal!!!
This is just an idea. I had a problem similar to this for 6 months. The corners would crack and bleed and hurt. My lips peeled and bleed-and it looked like I had some weird disease. Well I went to the dermatologist for my eczema, and it turns out the stuff on my lips was an allergic reaction too, just like the eczema. I found out what I was allergic to (haha-everything!) and learned how to avoid it. Turns out I was allergic to my toothpaste (plain colgate is all I can use) and my lipstick. As soon as I stopped using these, it cleared up and my lips haven't peeled since. Every once in awhile the corners will crack, and then I just put my steriod ointment (its called protopic) that I got from the dermatologist on my lips and it will clear up. I have heard you are not supposed to put steroid creams on your lips, but I do anyways if I need to.
OK, so my point is, maybe there is something you are using on or around your mouth that is causing irritation or allergic reaction. Do you have allergies? Perhaps change to plain colgate toothpaste or try a new lipstick or lip balm? Just some ideas-I had no idea my lip problems were allergies. Good luck!