I switched to a SLS free toothpaste (Closys generic brand) to help with my mouth ulcers, and I have only had one in the last few years! I highly recommend it. As for the thrush, I used hydrogen peroxide and brushed my tongue with it as it bubbled. Then I would open a probiotic capsule and let the powder sit on my tongue for a while. It tastes kinda funny, but helped regrow the good stuff in my mouth.