Is your way of brushing causing you Tooth Sensitivity?
 
 Have you noticed a  sharp pain  in your teeth after having  a cold drink  or any hot beverage ?  Are you having sharp pain even after eating sweet food?     source    It's probably the cause of sensitive teeth!   Do you know overzealous brushing i.e. either brushing with too much force or using a hard bristle toothbrush may cause wearing down the upper layer (enamel) of your teeth exposing inner layers containing nerve endings, causing tooth sensitivity.     source     What happens exactly?   1) improper method of brushing   Don't be too harsh on your strong teeth.  excessive vigorous brushing isn't going to make your teeth whiter or even cleaner.   2)Using whitening toothpaste  your enamel is the hardest surface of teeth but vigorous brushing with a denitrifies which has more of the abrasive agent may cause damage to the enamel     3)Gum damage   excessive brushing may also cause gum damage exposing roots of the teeth which may lead to sensitivity    So, brushing if not...