Can crest strips damage your teeth
Whitening strips can irritate gums or increase sensitivity, especially with decay, exposed roots, cracks or prolonged contact.
The short answer
Whitening strips place peroxide gel against the front tooth surfaces; risk depends on the product, contact time, fit and the condition of your teeth and gums. Possible problems include temporary sensitivity, gum irritation and uneven color when fillings or crowns are present.

What is the direct answer?
What does this question mean?
Peroxide passes into enamel and dentin and breaks down some stain molecules. It does not repair decay, cracks or enamel loss, and it cannot lighten tooth-colored restorations in the same way as natural tooth structure.
What can you do next?
Read the instructions, use only the stated wear time and keep the strip on the tooth rather than the gum. Stop if burning, ulceration or marked sensitivity develops, and arrange an examination before restarting when decay, cracks, gum recession or exposed roots are possible.
When should you seek dental care?
Ask for dental advice before whitening if you have untreated cavities, gum disease, enamel defects, severe sensitivity or a single dark tooth. Seek prompt care for persistent pain, swelling, ulcerated gums or a tooth that hurts without the strip.
What should you ask the dentist?
Ask whether the color is surface stain, internal discoloration or a restoration mismatch, and whether whitening is appropriate for the tooth surfaces. Ask how to protect exposed roots and what treatment is needed before cosmetic whitening.
Frequently asked questions
Can strips damage enamel?
Incorrect use or use on already compromised teeth can cause problems, so product instructions and dental condition matter.
Why are my teeth sensitive after strips?
Peroxide can temporarily irritate the tooth's nerve tissues, especially when dentin or roots are exposed.
