Tooth sensitivity occurs when the protective enamel wears down or gums recede, exposing the underlying dentin and nerve endings. Common triggers include cold drinks, hot beverages, sweets, and even brushing.

This article explains the underlying causes — from enamel erosion to gum recession and cracked teeth — along with home remedies, desensitizing toothpaste, and in-clinic treatments like fluoride varnish or bonding.