Detailed answer

Skin brighteners can be used on dry skin, as long as they are formulated with hydrating ingredients. Dry skin can benefit from skin brighteners that contain moisturizing agents such as hyaluronic acid or glycerin. These ingredients help to replenish moisture and prevent further dehydration. However, it is important to choose a skin brightener that suits your skin's needs and to follow the instructions provided. If you have any concerns, it is best to consult with a skincare professional or dermatologist.