That sharp “zzt” pain when you sip a cold drink or bite ice cream can be surprisingly strong. Tooth sensitivity often comes from exposed dentin – the inner layer under enamel – where tiny channels connect to the nerve.
Everyday factors slowly expose this layer: aggressive brushing with a hard brush, acidic foods and drinks, grinding, gum recession, or old worn fillings. Even frequent snacking on sour candies or fizzy drinks can contribute by eroding enamel over time.
First step is to treat your teeth more gently. Switch to a soft-bristle toothbrush, use light pressure, and avoid harsh scrubbing at the gum line. A toothpaste made for sensitive teeth can gradually help by blocking those tiny channels and strengthening enamel. Stick with it for a few weeks; it doesn’t work overnight.
Try to reduce constant acid hits – limit sodas, sports drinks and very sour foods. If you do have them, avoid brushing immediately afterwards; rinse with water and wait a little before brushing.
If sensitivity is severe, sudden, or limited to one or two teeth, visit a dentist. Sometimes, a cavity, crack, or worn filling is the real cause and needs specific treatment. With a mix of habit changes and proper care, most people can enjoy cold drinks again without that sudden shock.