Follow-Up:
I have suffered with this for 6 months! Some days better than others, but never resolved totally during the time. I consulted the dentist who was not too concerned-maybe stress. Pharmacist told me it might be stress related. I thought it was a possiblity at the time. I too thought related to toothpaste or lipstick or vitamin deficiency and seems to be none of these. I am somewhat reassured to know that there are a number of us out here looking for answers. I have tried lip therapies of every variety.