Common Risks and Side Effects of Teeth Whitening

teeth whitening side effects


A bright white smile is something many strive for, making teeth whitening treatments highly popular. However, along with the benefits of a whiter smile, teeth whitening has some risks and potential side effects to be aware of. Understanding the pros and cons, risks, and proper precautions allows you to lighten your teeth safely and minimize side effects. This article provides an in-depth look at the common risks and side effects of professional and at-home teeth whitening procedures.

Common Risks of Teeth Whitening

While generally safe when correctly done, some risks with teeth whitening include:

  • Chemical Burns – Hydrogen peroxide in high concentrations can burn gums, lips, and cheeks and cause ulcerations if improperly handled by unqualified persons.
  • Over-whitening – Going beyond the recommended treatment times and frequency can make teeth chalky and translucent.
  • Platelet Changes – Some studies indicate hydrogen peroxide may temporarily lower platelet production and adversely affect clotting factors in blood.
  • Tooth Decay – High amounts of peroxide may leech minerals, causing enamel weaknesses that demand extra re-mineralization therapy to avoid cavities.
  • Resin Deterioration – Teeth whitening may slowly break down dental bonding material and resin restorations like veneers or fillings over time and necessitate replacement.

Side Effects of Teeth Whitening

Common side effects of teeth whitening include:

  • Tooth Sensitivity – One of the most frequent side effects ranges from mild to moderate sensitivity and discomfort, usually subsiding within 1-4 days after treatment.
  • Gum Irritation – Whitening agents may cause temporary inflammation, swelling, redness, and tenderness in gums.
  • Dry Lips – Peroxide gels can dry out and chap the lips. Petroleum jelly helps minimize this.
  • Changes in Tooth Shade – If over-whitened, teeth hue may appear slightly bluish, chalky, or translucent.
  • Throat Irritation – Whitening gels may cause temporary sore throat in some individuals from small ingestion.

What are the Disadvantages of Professional Whitening?

  • Higher cost compared to over-the-counter options
  • Increased likelihood of post-treatment sensitivity
  • Necessity for occasional touch-up treatments
  • Existing dental work like crowns not changing color to match surrounding teeth
  • Possible short-term impacts on oral microbiome

What are the long-term side effects of tooth whitening?

With repeated or extended treatments, potential long-term risks include:

  • Accelerated tooth decay – Enamel may weaken over time, requiring preventive measures.
  • Progressive gum recession – Peroxide absorption into gums long-term leads to receding gums.
  • Nerve damage – Repeated inflation of nerves inside teeth may cause progressive sensitivity.
  • Dental restoration issues – Existing veneers, crowns, or fillings will not match newly whitened teeth.


To use teeth whitening safely and minimize side effects:

  • Get professional whitening done by a licensed, experienced dentist only.
  • Carefully follow all instructions for gel application and usage times.
  • Start with the lowest peroxide concentration before increasing strength.
  • Add re-mineralizing fluoride treatments to strengthen enamel after whitening.
  • Use desensitizing toothpaste for 1-2 weeks post-whitening if sensitivity occurs.
  • Avoid whitening if you have a significant recession, tooth decay, periodontal disease, or other oral health issues.


Teeth whitening is generally safe with minimal side effects when performed correctly and not overdone. However, improper procedures or overuse can result in risks like chemical burns, gum damage, and long-term tooth decay. Consulting a dentist first allows you to whiten safely based on your oral health. Proper precautions will enable you to lighten your teeth effectively while avoiding significant complications. Mylifesmile Dental provides professional whitening tailored to your needs for the best results with minimal sensitivity or side effects. Contact us today to get the dazzling white smile you desire – safely and comfortably!

Scroll to Top