Unintentional drug overdose deaths have increased exponentially in the last decade, both nationally. and statewide. In Ohio, there has been a 366% increase in drug overdose deaths from 2000 to 2012. Unintentional drug overdoses caused 1,914 deaths in 2012. deaths. opioid-related overdose deaths contrasted with a large increase in heroin-related deaths. Figure 1.
The biological reason behind teeth sensitivity to cold starts in the pulp of the tooth. The nerves in the pulp make teeth sensitive to cold when tooth roots become exposed due to receding gums or gum disease.
If it's your gums, you may be allergic to something in the toothpaste. Sensitivity to certain toothpaste ingredients is not unusual. It can cause gum soreness, or even gum tissue sloughing (peeling) like you peel after a sunburn. You should stop using it and see if the problem goes away. If you don't have sensitive teeth you don't need it anyway. I like Prevident 5000 for tooth sensitivity and cavity prevention. Prevident is a prescription strength fluoride gel. It has more fluoride than over the counter toothpaste and not only improves sensitivity but makes teeth more resistant to cavities.