A brief sharp feeling with cold, hot, sweet or acidic foods is often described as tooth sensitivity. It can affect one tooth or several, and the sensation alone does not identify the cause.
Sensitivity may be associated with exposed tooth surfaces, gum recession, wear, a cavity, a crack or a recent dental procedure. The right explanation depends on an examination, especially if the discomfort is new, focused in one tooth or getting worse.
Note what triggers the feeling, how long it lasts and whether biting also hurts. Keep brushing gently with a soft toothbrush, and avoid scrubbing hard around the gumline. A dentist can suggest care based on what they find.
Seek dental advice for persistent or severe sensitivity, pain that lingers after a trigger, or sensitivity with swelling or a visible break. Do not rely on a home remedy to diagnose or treat the cause.