10. Mint
Like most essential oils, it can be taken by mouth, but you don't want to take it in large amounts. You can also use it sparingly if you apply it to the skin as it can become irritating by developing a rash, red spots, or inducing a feeling of burning due to sensitive skin.
Peppermint is an ideal oil to use when you're having trouble with your stomach or digestion, from nausea to irritable bowel syndrome. Other health benefits include relief from itching and pain. It can also help fight the common cold and relieve headaches by gently rubbing it on your forehead or using a diffuser in your area.