Dentine hypersensitivity is sensation felt when the nerves inside the dentin of the teeth are exposed to the environment. This can be caused by various factors including receeding gums, toothbrush abrasion, grinding or wearing of teeth, and erosion of enamel. The sensation can range from irritation to intense shooting pain. Desensitizing agents can help reduce thermal sensitivity. The desensitizing agent is applied to the tooth surface blocking the exposed root surface and aids in reducing the sensitivity.