Bitter orange is an evergreen, flowering tree indigenous to the tropical parts of Asia and Africa. This was the only type of orange known in Europe until after 1500 and now grows cultivated or wild in most subtropical areas of the world. Almost all the parts of this tree are used in extracting essential oils due its healing values.
Since the ancient times, bitter oranges and the essential oil cold pressed from the rind of these fruits have carried away the world of medicine with its enormous medicinal values. It is one of the favorite oils used in aromatherapy by applying it to the skin and also to inhale as a painkiller.