Is peroxide bad for teeth and gums

Peroxide can irritate oral tissues when concentration, contact time, or use differs from a product's directions.

Hydrogen peroxide is an oxidizing agent used in some whitening products and oral preparations. Direct or repeated contact may produce temporary tooth sensitivity, gum whitening, soreness, or irritation, while enamel damage risk depends on the exposure and tooth condition.

Use only a dental product made for oral use and follow its label or dentist's instructions; do not swallow it or improvise a concentrated rinse. Stop the product, rinse with water, and arrange advice if burning, ulcers, persistent sensitivity, or gum colour changes develop.

Seek an examination for persistent pain, exposed root surfaces, cavities, cracked enamel, or gums that bleed or remain sore. Urgent care is appropriate after swallowing a substantial amount or when swelling affects swallowing or breathing.

Ask whether peroxide is appropriate for your enamel, fillings, crowns, gum recession, and sensitivity, and which formulation and contact time apply. Ask whether discolouration is surface stain, internal tooth colour, decay, or a leaking restoration.