Sudden tooth sensitivity usually happens when the protective layers of the teeth or gums are disrupted, exposing the inner dentin. This dentin has tiny channels that react quickly to cold, heat, sweet foods, or even air, which can make the teeth feel sore or sharp all at once.
Common triggers include gum recession, enamel wear, or recent dental procedures like cleanings or scaling. Brushing too hard, using abrasive toothpaste, or having acidic foods and drinks more often can also wear down enamel over time, even if the change feels sudden. In some cases, stress-related habits like clenching or grinding can make teeth more reactive.
Sensitivity that appears all of a sudden may be noticed more with cold drinks, hot foods, or brushing. It often affects several teeth rather than just one, which helps distinguish it from problems like cavities or infections. If the pain is brief and fades quickly after the trigger is gone, sensitivity is more likely than a deeper dental issue.
Avoid switching products or using home remedies without guidance, as some can worsen the problem. Using a gentle brushing technique and avoiding very acidic foods may help reduce irritation. If sensitivity lasts more than a few weeks or is getting worse, a dentist is the right professional to check for hidden causes and recommend safe treatment options.