Before finding Sensodyne Classic, I used to make a face like I just bit into a lemon every time I ate ice cream. I am sure many readers know the feeling when your teeth are sensitive to cold- or hot- and your tooth root starts to hurt. My gums and teeth are sensitive, they require special care, and as I found out from some of my friends suffering from the same condition, these whitening toothpastes only made the condition worse, not to mention that the enamel can get damaged from these products!