Sea Fresh Strengthening Toothpaste (Fluoride-Free)

I am allergic to sulfites. I have been told that by my internist and a dermatologist. I never thought it would affect my mouth but it was. I was getting a lot of canker sores and I didn't know why....

I had been breaking out at the corners of my mouth for over three weeks straight despite aggressive treatment. The lovely folks on the skin-care board suggested I might be having a bad reaction to...