When the protective layer of teeth (enamel) is worn away or gums recede, the dentine underneath becomes exposed. When the exposed dentine comes in contact with hot, cold, sweet, or sour food and drinks, it can trigger a sharp, short sensation called tooth sensitivity. Sensodyne Rapid Relief is a daily fluoride toothpaste that acts rapidly against tooth sensitivity while still providing the benefits of a regular paste, such as strong teeth and healthy gums. It starts to act rapidly by building a mineral-like layer over exposed dentine and within microscopic channels. The paste also builds ongoing protection with every brush, so that you can enjoy your favourite foods and drinks without the worry of sensitive teeth.