Does Teeth Whitening Cause Sensitivity?

Teeth whitening is one of the fastest and most effective ways to brighten your smile. Whether you’re preparing for a special occasion or simply want to refresh your appearance, whitening can dramatically improve the look of your teeth. However, many patients ask: Does teeth whitening cause sensitivity? The short answer is yes, it can — but it is usually temporary and can be managed easily with proper care. At Woodfield Dental in London, Ontario, we help patients whiten their teeth safely while minimizing any discomfort.

Why Can Teeth Whitening Cause Sensitivity?

Teeth whitening works by using special whitening agents that gently enter the enamel (the surface of your tooth) to break down deep stains. As this process happens, the enamel can become slightly more porous for a short time, which may expose the nerves inside the tooth to temperature changes. This can cause temporary sensitivity to:

• Cold drinks 
• Hot foods 
• Sweet or acidic foods 
• Air exposure 

This type of sensitivity is normal and typically fades within 24–48 hours after treatment.

Is Sensitivity Permanent?

No. Whitening does not damage your enamel or cause long-term sensitivity when done under professional supervision. Any sensitivity you experience is:

• Short-lived 
• Manageable 
• A natural response to the whitening process 

Professional whitening is carefully controlled to ensure your enamel stays healthy and strong.

Professional Whitening vs. At-Home Whitening Kits

Whitening Option	Sensitivity Risk	Why
Professional Whitening (In-Office or Custom Trays)	Low to Moderate	Customized to your enamel and monitored by a dentist
Store-Bought Strips or Gels	Moderate to High	One-size-fits-all; may use too strong or too frequent applications
Whitening Toothpaste	Low	Mild surface stain removal only

Professional whitening reduces sensitivity risk because it is designed specifically for your teeth.

How We Reduce Sensitivity at Woodfield Dental

At Woodfield Dental, we take steps to ensure whitening is comfortable:

• We evaluate your enamel and gum health before whitening 
• We select a whitening formula suited to your sensitivity level 
• Gum tissue is protected during treatment 
• Desensitizing products can be applied before or after whitening 
• Custom trays ensure even results and avoid gum irritation 

Our goal is to brighten your smile safely — without unnecessary discomfort.

Tips to Reduce Sensitivity After Whitening

To make the whitening process more comfortable, try the following:

• Use a sensitivity toothpaste (like Sensodyne) for 1–2 weeks before whitening 
• Avoid very hot or cold foods for the first 24 hours 
• Drink through a straw to minimize contact with cold liquids 
• Avoid acidic foods and drinks temporarily (e.g., citrus, soda, vinegar) 
• Take a short break if doing multi-day at-home whitening treatments 

These small adjustments can significantly reduce sensitivity.

Is Whitening Right for Everyone?

Most people can whiten their teeth safely. However, we may recommend alternative treatments if you have:

• Severe enamel wear 
• Advanced gum recession 
• Untreated cavities 
• Dental restorations that will not whiten (crowns, fillings, veneers) 

During your consultation, we’ll help determine the best option to achieve your desired results.

Brighten Your Smile Safely and Comfortably

Professional teeth whitening is a safe, effective way to enhance your smile — and any sensitivity is usually mild and temporary. At Woodfield Dental in London, Ontario, we’ll personalize your whitening treatment to protect your teeth and ensure a comfortable experience.

Book a Teeth Whitening Consultation Today

Let’s help you achieve a brighter, more confident smile — comfortably and safely.