Why Is My Tooth Sensitive to Hot or Cold? | Merchant's Walk Dental East Cobb

Sensitivity to hot or cold is usually caused by exposed dentin — the layer of tooth structure beneath the enamel. When dentin is exposed, temperature changes can stimulate the nerve inside the tooth, causing a sharp, brief pain or lingering discomfort.

Common causes include:

• Enamel erosion from acidic foods, drinks, or acid reflux
• Gum recession exposing the root surface
• A cracked or fractured tooth
• A cavity (tooth decay)
• A worn or damaged filling
• Teeth grinding (bruxism) wearing down enamel
• Recent dental work — temporary sensitivity after fillings or cleanings is normal

Brief, sharp sensitivity that fades quickly is often manageable. However, see your dentist promptly if:

• Sensitivity lingers for more than a few seconds after the temperature stimulus is gone
• You have spontaneous pain with no obvious trigger
• Sensitivity is accompanied by swelling, a bad taste, or pain when biting
• The pain is severe or getting worse

Lingering sensitivity can indicate that the nerve inside the tooth is inflamed or infected — a condition that may require a root canal to resolve.

Treatment depends on the underlying cause:

• Cavity — a dental filling removes the decay and protects the tooth
• Cracked tooth — a crown covers and protects the tooth from further damage
• Gum recession — a deep cleaning or gum treatment addresses the root cause
• Nerve involvement — a root canal removes the inflamed or infected tissue
• Enamel erosion or grinding — a night guard, fluoride treatment, or crown may be recommended

Merchant's Walk Dental provides care for patients throughout East Cobb, Marietta, Roswell, Kennesaw, Smyrna, Woodstock, and Alpharetta. Call (770) 691-5051 or schedule online.