There Are Many Potential Causes for Dental Sensitivity
A cavity or decay under the surface can cause pain and make your tooth more sensitive to temperature changes.
A crack or fracture in a tooth may not constantly cause pain, but instead, react to certain foods or drinks.
Fillings protect areas of teeth which have been damaged. When they become worn, the nerves inside of teeth may be exposed to external elements, leading to sensitivity.
When enamel becomes too thin to protect the nerves within teeth, dentin hypersensitivity can result.
If gum recession or other issues have left your roots exposed, it can cause dental sensitivity.
Inflammation in the gums can make teeth more sensitive and cause gums to recede, leaving the roots exposed.