Current theories on the causes of canker sores have focused on the immune system. This research suggests that canker sores may be caused by the body's own immune system attacking the cells lining the inside of the mouth. The first canker sores usually occur between the ages of 10 and 20. During life, episodes usually, but not always, become less frequent and less severe. Interestingly, women often report increased susceptibility to canker sore formation during certain times of their menstrual cycle.
Some women report complete relief from canker sores during pregnancy.
Secondly, trauma to the inside of the mouth may trigger the production of canker sores. Cut down on eating foods like potato chips, hard pretzels, cut apples, and hard candies which might nick, abrade, or otherwise traumatize the oral tissue. As far as overzealous brushing, most people can not consciously stop brushing so hard, because tooth brushing is such an ingrained habit. Consequently, we encourage them to use our SuperSoft Nylon Toothbrush, made for us by experienced toothbrush manufacturers in England. It's virtually impossible to cause damage with these soft, yet strong bristles.