Tooth sensitivity is the result of the demineralization and loss of the enamel. Symptoms of demineralization include transparency, cracking, and discoloration of the teeth. This can be caused partially by diet (i.e. over-consumption of acidic foods, large amounts of sugar, and also certain medications), hygienic issues (excessive brushing, brushing with excess force, and bleaching), and other behaviors (trauma, habitual grinding and clenching of the teeth, acid reflux, and frequent vomiting). Some people are even genetically prone to tooth sensitivity.