Tooth Pain can be a PAIN, but there is a reason why our bodies try to notify us that something is wrong. Tooth pain can be an indication of infection, irritation, injury, or decay. It can be lingering, persistent, sharp, dull, off and on, but just altogether awful!
When you experience tooth pain, it is best to get a professional opinion to ensure that you address dental issues immediately. Waiting for tooth pain to go away on its own will undoubtedly lead to a more complex, and sometimes more costly, treatment later.
Anatomy of a Tooth
To explain tooth pain, you should first know more about how a tooth is structured. 
The tooth is composed of layers. The outermost layer, the enamel, is the hardest layer and the first defense in protecting the inner pulp or root from decay and infection.
A variety of factors including poor oral hygiene habits, lack of regular dental exams, diet, genetics, etc., all play a role in slowly eroding the protective enamel later. As the enamel erodes, the softer, more sensitive layers inside the tooth become exposed. Some patients experience pain with little to no enamel erosion and others don’t feel anything until the decay or infection has reached all the way down to the pulp or root.
This is why regular dental visits are so important. Your dentist can inform you about decay or infection before it reaches the point of severe pain, or worse, more invasive, costly dental procedures that are required to try to save your tooth. The worst outcome, of course, is loss of the tooth completely.
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So the day has finally come. Your dentist has told you that one of your teeth is extremely damaged and that you need root canal therapy. You have been dreading this for years. You’ve always heard about how painful root canals are–can’t they just mercifully pull your tooth and be done with it? Actually, the “pain” often associated with the procedure is a complete myth, all thanks to modern dentistry. Root canal therapy is actually one of the best ways to relieve your worst dental pain, not cause it.