Sensitivity is the most common whitening concern—but it’s also the most manageable.
Why Whitening Causes Sensitivity
Peroxide temporarily increases tooth permeability, allowing nerve endings to react more strongly to temperature changes.
This effect is:
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Temporary
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Reversible
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Fully resolved in most cases within weeks
Who Is More Sensitive?
People with:
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Gum recession
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Naturally sensitive teeth
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Thin enamel areas
How to Prevent Sensitivity Before Whitening
Start 2–3 weeks before whitening:
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Use potassium nitrate toothpaste
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Avoid aggressive brushing
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Maintain good oral hygiene
After Each Whitening Session
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Rinse with water
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Use an anti-sensitivity rinse
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Wait at least one hour before brushing
For very sensitive teeth, lower concentration carbamide peroxide worn longer is often more comfortable.
Next Reads:
→ Does Whitening Damage Enamel?
→ How Often Should You Whiten?