If your teeth are sensitive to heat and cold, do this:
Warm some milk to room temperature, then swish it around your mouth for 5 minutes, 5 times a day. A recent study found that can dramatically reduce tooth sensitivity. And for over 50% of people, it provided total relief within 10 days! That’s because milk has a protein called casein, which thickens tooth enamel. And milk helps protect sensitive nerve endings by plugging open pores in tooth enamel with calcium phosphate. So swish room temperature milk around your mouth for 5 minutes, 5 times a day for tooth sensitivity.