I used this product for two weeks hoping my teeth would become less sensitive. After about three days they started aching and after a week and a half they were so sore I could barely eat. The instructions say that there might be something else going on with your teeth to cause this pain, like unknown cavities or gum disease, but I recently had a check-up and they found neither. It took at least three more weeks until my pain subsided and I could eat normally again.
