Detailed answer

Hand creams are primarily formulated to nourish and moisturize the hands, not specifically to treat hyperpigmentation or friction-related darkening of the elbows. To effectively address these concerns, it is best to use products specifically designed for skin lightening or exfoliation. Look for creams or serums containing ingredients like hydroquinone, kojic acid, or alpha hydroxy acids which can help with hyperpigmentation. Additionally, regular exfoliation using gentle scrubs or chemical exfoliants can help to remove dead skin cells and promote skin renewal. It's important to note that for severe hyperpigmentation or stubborn darkening, it may be necessary to seek professional dermatological treatment or advice for more targeted solutions such as chemical peels or laser therapy.