While dry skin can be hereditary, it can also be caused or worsened by: too much sun and wind, from harsh soaps, poor diet, alcohol consumption, lack of fluid intake, drying cosmetics or medications taken internally.
Skin may have both dry and oily areas - perhaps an oily "T-zone" and dry cheeks. The sebaceous glands will need stimulating to normalize sebum (oil) production.
The use of the right essential oils will give the skin needed lubrication and still encourage the skin to make its own natural oils. The Hydrating Collection will be most helpful for your skin.