It is a common misconception that if you have healthy eating habits, exercise regularly and brush frequently, you are assured of a healthy set of teeth and gums.
The main issue to consider is how long your teeth are exposed to an acidic environment. Prolonged exposure, such as by eating too much sugar, tends to dissolve the enamel surface of your teeth. When strong acid is continuously present, the natural defence system of your mouth loses its relevance and this leads to rapid tooth wear. This erosion of the enamel on the surface of your teeth will lead to the soft inner part being exposed. In turn, this leads to sensitivity which is a disturbing condition.