If your skin tends to have an old appearance, looks ashy or feels tight, then it is considered dry. In more extreme cases, dry skin lacks elasticity and can be extremely sensitive to the sun, wind, and cold temperatures. Since you have dry skin, you have to make sure that you do not expose your skin to extreme weather for long periods of time and always moisturize.
Treatment: Find a moisturizing bath soap or body wash with natural oils like almond, coconut or olive oil. Any other oil of your choice is ok if you have preference. Weekly treatments are recommended for your skin. Fill a tub with honey, milk and half a cup of any nourishing oil and add boiling hot water to the mix. Wait for it is cool to your desired temperature then soak for as long as you want; the longer the better. For ladies, make sure to exfoliate every other day and always wash your makeup off. Since you have dry skin, exfoliate gently and every two days and moisturize every morning and night before bed. For makeup, make sure to use only the ones with natural products. Such brands like Bare Minerals comes highly recommended. Try their tinted moisturizer collection.