Next to each hair is a sebaceous gland which secrete sebum which lubricates the hair and provides each hair with an element of protection. If the sebaceous glands are overactive greasy or oily hair will result. If the glands are underactive dry hair may result including breakage.
Daily Hair Tip
Know your hair type and be realistic about what hair styles work best with it. Don't agree to a new hair style that you know in your heart will be impossible to duplicate at home.