Why do you have toothache when you brush your teeth?

"Toothache is not a disease, it hurts like hell." This statement has been circulating among the people for a long time. Actually, toothache is the external reaction of your teeth. It may be dental caries or the gums or canine teeth around your pulp are infected. Of course, cracks in your premolars can also cause toothache, and sometimes it's just vegetable residues stuck between your teeth that cause discomfort. In addition, toothache may also be caused by sinusitis. If you have a toothache, you'd better go to the dentist to find out the real cause of your toothache.