Hair oils are used all over the world since time immemorial; however, their exact effect on the hair and scalp remains obscure. They are usually easily accessible and are inexpensive. A wide variety of oils have been used and newer ones are coming up every day. The primary function of most of the hair oils is to act like an emollient but the unique characteristics of various hair oils suggests its action just more than emollient action. This article focuses on the different types of hair oils and their possible beneficial effects on the hair. Dermatologists need to be aware of the effects of hair oils and their usage.