Dehydrated and dry skin are two distinct conditions that require different approaches to treatment. Dehydrated skin lacks water, while dry skin lacks oil. Both can result in dullness, flakiness, and irritation. To hydrate dehydrated skin, it’s important to use a gentle cleanser, exfoliate weekly, and apply moisturizing products containing hyaluronic acid, glycerin, ceramides, or natural oils. To treat dry skin, it’s necessary to replenish oils using creams or ointments.