Dehydrated skin is often used to describe dry skin, but they are not the same. Dehydration describes a lack of water in the skin, which can occur in all skin types. Dry skin is a skin type characterised by low sebum production in the skin leading to dry, tight, and itchy skin.  Symptoms of dehydrated skin and dry skin are very similar, but dehydrated skin does not persist whereas dry skin is permanent companionship. If you occasionally experience dry skin and fine lines are more noticeable, it might be due to dehydration and not because you have a dry skin type.