Which of the following should be used to treat an allergy of the skin?

Using lotions to treat a skin allergy is appropriate because certain lotions can provide relief from irritation and hydrate the skin, which is essential when dealing with allergic reactions. Many lotions contain soothing ingredients like aloe vera, chamomile, or even anti-inflammatory components, which can help alleviate discomfort and reduce redness associated with allergic reactions.

In contrast, soap and water, while essential for cleaning the skin, are not specifically designed to treat allergic reactions and may sometimes exacerbate irritation if the skin is sensitive. Antiseptics are primarily used to prevent infections and may contain harsh ingredients that could further irritate allergic skin. Hydrogen peroxide is typically used for its disinfectant properties and might cause additional irritation rather than relieve an allergy. Therefore, lotions formulated for sensitive skin or containing calming ingredients are the most suitable choice for managing skin allergies.