Sensitive teeth: causes, home care and dental treatment
Sensitivity is a symptom, not a diagnosis. The pattern and duration help distinguish exposed dentine from decay, cracks and other causes.
Dr. Suneeta Veeramachaneni
13 September 2026 · 5 min read
A short, sharp response to cold air, drinks, sweets or brushing often comes from exposed dentine, the porous layer beneath enamel. Gum recession, tooth wear and acidic erosion can expose it, but cavities, cracks, leaking fillings and nerve inflammation can also cause sensitivity.
Notice the pattern
General sensitivity across several teeth may relate to brushing technique, recent whitening, erosion or gum recession. Pain from one tooth, pain on biting, spontaneous aching or discomfort that lingers after heat or cold needs closer assessment.
Recent dental treatment can create temporary sensitivity as the tooth settles. Tell the clinic if symptoms worsen, disturb sleep or do not follow the expected recovery.
Safe steps at home
Use a soft toothbrush, light pressure and a desensitising fluoride toothpaste. Spit after brushing and follow product directions; repeatedly rinsing immediately can reduce fluoride contact. Improvement may take consistent use rather than one application.
Reduce frequent acidic drinks and avoid brushing immediately after an acidic exposure. Do not apply aspirin or unverified strong substances to the tooth or gum.
How a dentist treats sensitivity
Treatment targets the cause and may include fluoride varnish, sealing exposed dentine, a filling, bite adjustment, gum care or management of grinding. Deep inflammation may require root canal treatment, but sensitivity alone does not mean a root canal is inevitable.
Early evaluation is especially useful for a cracked tooth because cracks can progress. A normal-looking surface does not always rule one out.
Frequently asked questions
Can sensitive teeth go away?
Sensitivity may improve when exposed dentine is protected and triggers are controlled, but decay, cracks or persistent symptoms need professional treatment.
Does tooth sensitivity mean I need a root canal?
Not necessarily. The dentist assesses pain pattern, examination findings and imaging before deciding whether the nerve is reversibly irritated or more seriously affected.
Written by
Dr. Suneeta Veeramachaneni, DDS, University of California, San Francisco
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