Tooth sensitivity is a short, sharp sensation triggered by temperature changes, sweet foods or pressure. It often results from enamel wear, gum recession or exposed dentin and can be temporary or signal an underlying dental issue. Below are common causes, how dentists evaluate it and practical prevention measures.
What is tooth sensitivity?
Tooth sensitivity causes brief, sharp discomfort when specific stimuli reach the tooth’s inner layers. When enamel thins or gum tissue recedes, dentin and its microscopic channels can be exposed and react to temperature, chemicals or touch. Sensitivity can be intermittent or persistent depending on the cause.
Common causes
Enamel erosion from acid exposure, mechanical wear from aggressive brushing or bruxism (tooth grinding), gum recession exposing root surfaces, cracked or fractured teeth, dental decay or failing restorations, and recent dental procedures such as whitening. Each cause may need a different clinical approach to manage.
When to consult a dentist
Mild, short-lived sensitivity often improves with preventive measures, but you should see a dentist if sensitivity lasts for several days, increases, disrupts sleep or is accompanied by persistent throbbing, swelling, fever or other signs of infection. Rapidly spreading facial swelling, trouble breathing or swallowing, and uncontrolled oral bleeding require immediate emergency care.
How dentists evaluate it
A clinician will examine teeth and gums, perform cold or pressure tests and check bite and restorations. X-rays or pulp vitality tests may be used. Based on findings, the dentist may treat directly or refer to specialists such as an endodontist (root canal), periodontist (gum care) or oral surgeon for further assessment.
Prevention and helpful at‑home measures
Protect enamel and gum health: use a soft‑bristled toothbrush with gentle technique, reduce acidic foods and drinks, maintain regular dental check-ups, and discuss a night guard if you grind your teeth. Over‑the‑counter sensitivity products exist, but professional assessment is recommended before starting any targeted treatment.