I have a slight rash on face begining at corners of the mouth. I’ve gotten this a few times before over the years. The size of the rash never gets larger than about 1/4 inch square. It doesn’t itch. It DOES burn, but only when in contact with things like toothpaste, moisturizer lotion, and citris fruit. Also, the corners of my mouth sometimes get cracked when the rash appears.

Do you think that this may be happening because I am allergic to toothpaste? Perhaps the fluoride or some other ingredient in it?