Health & Fitness
Teeth whitening is popular for improving the look of your smile. Many people choose at-home kits or visit a dentist for professional treatment. While results are often good, some people feel pain or sensitivity after whitening. This article explains why teeth may hurt after whitening and what you can do about it.
1. Whitening Opens the Pores in Enamel
Whitening products use chemicals like hydrogen peroxide or carbamide peroxide. These chemicals remove stains by entering the enamel layer.
Why it hurts:
Enamel has tiny pores. Whitening opens these pores to reach the stains inside. This also allows heat, cold, or air to reach the tooth’s nerve, which can cause pain or sharp sensitivity.
2. Overuse or High Concentration
Some products contain high levels of bleaching agents. Using them too often or for too long increases the risk of pain.
Why it hurts:
Stronger products can irritate the nerves in your teeth. If used more than recommended, they may wear down enamel and expose the sensitive layer below.
3. Existing Dental Problems
Teeth with cracks, cavities, or worn fillings can react badly to whitening.
Why it hurts:
Whitening agents can seep into damaged areas and reach the nerve more easily. This causes sharp, shooting pain or throbbing discomfort.
4. Gum Irritation
Whitening gel that touches the gums may cause burning or stinging.
Why it hurts:
- The chemicals in whitening gel can damage soft tissue. This leads to sore gums, especially if trays don’t fit properly or if gel leaks out.
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