There are many products on the market that alleviate cold sensitivity. The most recommended one is sensitivity toothpaste containing potassium nitrate. Also, high fluoride products like Prevident, which can be prescribed by your dentist, are recommended. In addition to these, using proper toothbrushing technique (soft bristle brush) or an electric toothbrush will prevent toothbrush abrasion. Toothbrush abrasion exposes the roots of the tooth which can be very sensitive to cold.