Tooth Ache can be a very difficult pain to bear sometimes not even allowing the sufferer to sleep. The reasons for tooth ache can be many. The source of the pain could be the tooth or one of its supporting structures like gums or bone or even a combination of all three. The tooth is supplied with blood vessels and nerves and any decay which involves the pulp of the tooth can be extremely painful. In the initial stages of infection,other parts of the body are able to accommodate the infection by swelling. The tooth being a hard structure cannot do the same. That is the reason why tooth ache is considered to be the one of the most unbearable pains.