How to relieve pain from teeth whitening?

teeth whitening, tooth pain


While teeth whitening procedures aim to give you a brighter, more confident smile, they can sometimes cause pain and discomfort as a side effect. Understanding why whitening causes pain and learning proven ways to get relief can help you whiten your teeth more comfortably. This article will cover how long post-whitening pain lasts, why it occurs, the least painful methods, and, most importantly, tips to relieve pain from professional or at-home tooth whitening effectively.

How Long Does Pain Last After Teeth Whitening?

Most patients experience some degree of sensitivity or pain after whitening their teeth professionally. The discomfort ranges from mild to moderate and generally lasts 1-4 days after the procedure. In more severe cases, significant hot and cold sensitivity may persist for 1-2 weeks before entirely subsiding. You can minimize discomfort with proper post-whitening oral care and pain relief remedies. If pain continues beyond two weeks, contact your dentist.

Why is Whitening So Painful?

There are a few key reasons why you may experience painful sensitivity from teeth whitening:

  • Chemical Penetration – Hydrogen peroxide in whitening gel seeps through the enamel and irritates the dentin layer with nerve endings.
  • Dehydration – Whitening strips moisture from enamel, causing temporary porosity and sensitivity.
  • Gum Tissue Irritation – Whitening gel touching the gums can cause inflammation and tenderness.
  • Micro Fractures – Tiny cracks and fractures in enamel may form, exposing sensitive dentin.
  • Increased Temperature Sensitivity – Whitened teeth are more prone to reaction from hot and cold.

Luckily, many simple, effective ways to treat the pain are by re-mineralizing, desensitizing, and soothing your teeth and gums after whitening.

What is the Least Painful Way to Whiten Teeth?

Over-the-counter whitening strips cause the most sensitivity due to their improper fit, allowing gel contact with gums. When done correctly, dentist-supervised in-office laser whitening tends to provide the least painful whitening experience. Reasons it is the most comfortable include:

  • Desensitizing gel formulas helps block pain.
  • Light accelerates whitening, reducing time for sensitivity.
  • Professional isolation prevents gum irritation.
  • Customized application and dosing prevent over-whitening.
  • Dentists can immediately treat any sensitivity that arises.

While professional whitening causes less pain overall, every patient responds differently. Discuss options with your dentist.

How to Relieve Pain from Teeth Whitening

If you experience painful sensitivity after whitening your teeth either professionally or with home kits, try these fast-acting remedies:

  • Use desensitizing toothpaste containing potassium nitrate or hydroxyapatite. Brush gently after whitening.
  • Rinse your mouth with warm salt water 2-3 times daily to reduce inflammation.
  • Take over-the-counter pain medication like ibuprofen as directed if severe.
  • Apply petroleum jelly or aloe vera gel to soothe irritated gums.
  • After the dehydrating whitening treatment, drink lots of cool water to rehydrate your enamel.
  • Avoid extremely hot or cold foods and beverages that trigger sensitivity.
  • Use a sensodyne-type toothpaste daily for 1-2 weeks post-whitening.
  • Get fluoride treatment at your dental office to strengthen enamel.
  • Keep excellent oral hygiene to prevent worsening sensitivity with cavities or decay.
  • If you prepare for the possibility of pain and follow these tips, you can complete your whitening treatment comfortably. However, contact your dentist immediately if you experience severe, persistent pain.


After whitening treatments, it’s normal to have some mild to moderate tooth and gum sensitivity or pain. Knowing what causes the pain and applying simple relieving measures can keep discomfort minimal and temporary. With professional in-office whitening under the guidance of your dentist, you can achieve maximum whitening benefits with less discomfort. Mylifesmile Dental provides state-of-the-art whitening options for dramatically brighter smiles, prioritizing patients’ comfort and satisfaction.

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