Enamel is the hard, non-porous outer surface of a tooth.Tooth enamel is responsible for providing strength to teeth as well as protection to the more delicate and sensitive inner portions of teeth. If you have lost enamel, your teeth are likely to be more sensitive. Erosion can occur in many ways, ranging from acid reflux, bruxism (tooth grinding) to improper tooth brushing technique.
Gum recession is a condition in which the gum pulls away from the tooth, exposing a more delicate part of the tooth known as dentin, or in some cases, the root structure. These parts of the teeth are far more porous than enamel and allow painful stimulants to flow in and out easily.
If you have sensitivity on a single tooth, there is a chance that it could be due to a cavity. Teeth that are sensitive to sweet foods in particular are more likely to have tooth decay.
If you experience sensitivity in your teeth, your dentist might recommend using an over the counter sensitivity toothpaste, or prescription strength toothpaste and mouthwash. Your dentist may also apply fluoride varnish or desensitizing solution directly on the teeth. No matter the case, there are multiple ways to get relief from tooth sensitivity. Your dentist can figure out the cause and help you find the right solution for you.