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Sensitive Teeth

That sharp zing with ice water or a cold breeze usually means dentin — the porous layer under enamel — is exposed somewhere, most often at receded gumlines or worn enamel. It's common, and usually manageable without drama.

Common causes

Gum recession from aggressive brushing or gum disease, enamel wear from acidic drinks or grinding, a cracked tooth, a leaking filling, or recent dental work (temporary and normal). New sensitivity in one specific tooth is more suspicious than the all-over kind and deserves an exam.

What actually helps

Potassium-nitrate 'sensitivity' toothpastes genuinely work but need two to four weeks of consistent use — don't rinse after brushing. Switch to a soft brush and lighter pressure. A dentist can apply fluoride varnish or bonding to exposed root surfaces for stubborn spots. Sensitivity that lingers minutes after the trigger, or arrives with pain on biting, has graduated to 'get it examined.'

Related

• Toothache
• Bleeding gums
• Find dental clinics by state

Sources

• MedlinePlus (NIH): Dental Health
• ADA MouthHealthy (American Dental Association)

General dental-health information, not medical or dental advice. In an emergency, call 911 or go to the nearest emergency room.