Why you have a toothache can depend on the type of pain you feel. This pain may come in the form of sharp, biting pain, or it may be dull and chronic. Your toothache presents such significant pain due to what is in your tooth pulp—the nerves. Therefore, if you have any irritation or infection of the pulp, you will have some severe pain. Learn more in our blog article, "Toothaches: Causes, Symptoms and Treatment."