Natural cold-pressed peppermint oil helps relieve muscle cramps, muscle tension, bloating, and fever. It also works to boost circulation and soothe itchy skin. How to use: In bathwater during bathing, or during a massage, or applied to both sides of the forehead with a gentle massage to relieve headaches. You can also use it as a hair oil treatment once a week mixed with sweet almond oil in the same ratio to get rid of dandruff and cleanse the scalp.