What should I do if I develop a skin allergy after using hydrogen peroxide?

Hydrogen peroxide–induced skin allergy can typically be treated with saline solution, medications, and other approaches. Thoroughly rinse the affected area with copious amounts of normal saline or clean water to help prevent an allergic reaction. If itching or a rash develops, avoid scratching—scratching may introduce bacteria and lead to infection. Antipruritic and antiallergic medications may be taken under a physician’s guidance. In daily life, avoid using hydrogen peroxide altogether to prevent recurrence of the allergic reaction.