can some one please give me some indication as to what this very tiny purple bump just on the inside of my lower lip is? It has been there before, it's painless, and went away before too. It's taking longer this time. it's not the bump you can see but the discoloration which is slightly purple. I will mention that I have Dermatitis Herpetaformis on my hands. I am wondering, is this a manifestation of the dermatologocal condition I have mentioned, or is it something else? Is it possibly cause by grinding my teeth at night? HOW DO i GET RID of IT!!!???