Creams are not always appropriate for some applications because they can be too heavy or greasy. In these cases, the lotion form is used. Lotions are essentially thin creams. They are used for facial moisturizers, leave-in hair conditioners, and moisturizing cleansers. Since these are emulsions, you make them the same way you would a cream. They are generally easier because you do not have to worry about the emulsion getting thick enough as it cools down.