Side of mouth cracked and split. Is it normal for Invisalign to cause this?

February 2, 2016
Asked By:TraceyD in London, GB

Hi, I am on tray 1/13 and after week one the side of my mouth/lips have cracked an split. Each time I remove my aligners my mouth splits again. I have been using Cymex cream but it is not really helping. Is it normal for invisalign to cause this?