Question from our Readers: Whitening Sensitivity

Reader Question: I’ve been using a whitening toothpaste, but now my teeth are sensitive. Is this normal?

It sounds like you’re being super proactive about your oral health, which is fantastic. I understand the frustration of wanting a bright smile but experiencing sensitivity when using whitening toothpaste.

Let’s look into why this happens and what you can do to achieve your teeth goals with minimal discomfort.

Why Whitening Toothpaste Can Cause Sensitivity

Here’s the thing⁠—the ingredients in whitening toothpaste that help remove stains can sometimes irritate your teeth. The two main culprits are:

• Peroxides ⁠— These bleaching agents (like hydrogen peroxide) are great for whitening but can penetrate the enamel and temporarily irritate the tooth’s nerve. This is often the cause of that sharp twinge you feel.
• Abrasives ⁠— Whitening toothpaste often contains little rough particles (like baking soda) that help scrub away surface stains. But over time, they can erode the enamel, exposing the more sensitive dentin layer underneath.

What to Do About Whitening Sensitivity

Don’t worry, the sensitivity from whitening toothpaste usually lessens over a few days, especially if you take action. You can try the following:

• Switch to a toothpaste labeled for sensitive teeth. Look for ingredients like potassium nitrate or stannous fluoride, which help block nerve pain signals.
• Use a soft-bristled toothbrush and avoid putting too much pressure on your teeth.
• Avoid extremely hot or cold foods and drinks for a while, as they can worsen sensitivity.

How to Minimize Sensitivity While Whitening

It’s completely possible to have brighter teeth without constant discomfort. Let’s talk about ways to continue whitening while minimizing sensitivity:

• Opt for lower concentrations ⁠— Many whitening toothpastes have varying peroxide levels. Look for lower concentrations or use the product less frequently.
• Consult your dentist ⁠— Your dentist can offer professional whitening treatments with specialized formulas better tailored to your sensitivity levels.
• Targeted application ⁠— If only certain teeth are sensitive, apply the whitening product only to the less sensitive teeth.

Minimizing sensitivity from whitening toothpaste goes beyond just taking care of your oral health:

• Diet matters ⁠— Regularly enjoying acidic drinks (like soda or sparkling water) can contribute to enamel wear over time. Try using a straw for these beverages to lessen their contact with your teeth.
• Strengthening your enamel is important ⁠— Regular fluoride toothpaste helps remineralize your enamel. This makes it stronger and less prone to sensitivity.

Remember, any sensitivity you’re feeling from the whitening toothpaste is likely temporary. By making these small changes and giving your teeth time to recover, you should be back to sipping your morning coffee without wincing. 

If the sensitivity persists for several weeks or worsens, it’s always a good idea to check in with your dentist. They can rule out any other dental issues and suggest personalized solutions for getting a bright and pain-free smile.