The ointments form a oily barrier on the surface of injuries and carry the active principles to the wounded or affected area. An herbal cream is a mixtures of oils or fats with water. Since water and oils are not miscible, it is necessary to add an emulsifying agent that avoids their separation. The creams become stable emulsions of oils or fats. The medicinal properties are added to creams by way of a tincture, an infusion, an oil infusion, an essential oil or a decoctions.
Herbal creams allow the skin to breathe and sweat.
The water content and some additional hydrophobic agent like Glycerin will promote the hydration process and a cooling effect of the skin.