I have burning lower lip since two years. The burning comes and go. The burning was completely gone from April till september 2014. The burning is mainly in the day time. I don't have any pain when i am sleep. I have no diabetic. I'am using :Just for Man" beared coloring and it is giving itiching on my chin and face. I am using this product for 5-6 years but since two years it is giving me itiching. I am worried about my lower lip burning. Doctors said I have no problem and they don't see any thing on my lip. Please advise