Doctor, I am an 18 year old male, I recently came back from a week in Cuba, and about halfway during my stay I started getting minor mouth sores (canker) and a slight tingling/irritation of the skin on the outside of my cheek of the responding side of the sores, very small bumps aswell leading from my lip/mustache line to my chin, slight redness, very small bumps (not visible, you have to feel) and slight dryness of skin, my oral hygiene is very good. I live in Vancouver and it is very cold. my doctor has prescribed me Cortate ointment for the skin on my cheek, but it does not seen to be helping.