An allergic reaction can last for several days if the allergen is not removed. It is important to avoid further exposure to the allergen, whether it is in the form of dust, soap, cream, or food. To help alleviate the reaction, use fragrance-free soap and moisturizer multiple times a day. Avoid rubbing the skin vigorously after bathing and instead gently pat dry before applying moisturizer. If the situation persists for more than 5 days or worsens, it is recommended to consult a doctor for further evaluation.