This cooling and refreshing essential oil is used in aromatherapy to stimulate the mind, increase mental agility and to increase focus, while cooling the skin, reducing redness and calming irritation and itchiness. It furthermore helps to ease spastic colon, migraine, headaches, sinus and chest congestion and boosts the digestive system. Peppermint oil has a fresh, sharp, menthol smell, is clear to pale yellow in color and watery in viscosity.