After a bout of the flu, my lips became very dry and chapped, which went away after about 4 weeks and then the corners of my mouth began to crack. Only vasoline was able to help with the pain and cracking. this went on for about 6 weeks, and slowly went away and I was fine for about 2 weeks. Now I have cracking on one side of my mouth and I've also developed a raw feeling under my tongue and between my lower lip and gum, in addition to what feels like a canker sore there (I've never had a canker sore in my life) I'm 56, female and take multiple vitamins including B-Complex. What might help? Or what might this be?