Does swishing hydrogen peroxide whiten teeth

Swishing hydrogen peroxide may affect some stains, but uncontrolled concentration and contact can irritate gums and oral tissues.

A rinse is not equivalent to a tested whitening tray or gel because concentration, pH, exposure, and swallowing risk differ.

Do not swallow peroxide or use a non-oral product; stop if the mouth burns, becomes sore, or develops white peeling tissue. For a whitening result, have the teeth and gums examined and use a product and instructions supplied for oral use.

Seek advice after swallowing peroxide or if burning, vomiting, persistent pain, swelling, or breathing difficulty occurs. Book a dental assessment for persistent staining, one dark tooth, cavities, gum inflammation, or sensitivity.

Ask whether the discoloration is a surface stain or a change within the tooth and which treatment matches it. Ask about the exact product, concentration, application time, gum protection, and alternatives to rinsing.