Ginger oil is extracted from the ginger rhizome after a distillation process. Like other essential oils, it’s very concentrated. Ginger oil has a distinct aroma that can be described as strong, warm, or spicy. As such, it’s often used for aromatherapy. Ginger oil can also be used in a variety of applications in the skin and hair. Ginger and ginger oil have also been used to help ease nausea, arthritis, digestive upset, colds and migraines.