Orange oil is the second most used of all citrus essential oils. It is most often used as an antidepressant because it helps you clear stagnant thoughts and strengthen your focus. It also freshens the air and helps clear germs. As a digestive aid, Orange helps you treat impaired digestion. It helps to normalize intestinal function, which will relieve both constipation and chronic diarrhea. It has a sedative effect on the nervous system and as such, it helps calm anxieties as well as nervousness, cardiac spasm, palpitation, and false angina. It will help you relieve muscle spasm. It will also help you overcome insomnia. Orange has helped some people treat bronchitis, flu, and other respiratory illnesses. It works best, in this respect, when used with other oils like Frankincense, Eucalyptus, the mints, and the spices.