A sensitive tooth is a condition, whose name is not that scary, but can be really uncomfortable at times. Your teeth will react to cold, hot, sour or sweet or even sometimes from the pressure of chewing food. Sadly, it’s really hard to determine what the cause of this sensitivity is due to the huge amount of reasons for it. It may differ from dental disease to trauma, which is the premise for the destruction of tooth pulp, cured with a root-canal procedure to relieve your pain.