If you are experiencing sharp, dull or lingering toothache, read this: Tooth pain is a protective response from your body telling your that something is wrong. The most common cause of dental pain is tooth decay, a bacterial infection that can spread through many parts of the tooth, and even into the gum tissue. The only sure way to know exactly what's causing tooth pain, is to see a dentist. Your dentist will ask your specific questions about the pain and discomfort and will