Well, yes, aroma oil can be good for reducing dark circles under eyes. Generally speaking, there are many causes which can lead to dark circles, such as sun exposure, allergies, drugs, nutrition, fatigue, and lack of sleep. By using aroma oil, it will just relieve the situation. You should know that aroma oil is useful as it hydrates skin and it also contains vitamin (A) and vitamin (D).
In other words, it can work on tighten skin and to lighten skin color. in a few days, it can disappear. By the way, you can try tea compresses. Just put a tea bag or a little of tea leaves in a thin cloth then place them in warm water for seconds then on the dark area for 10 minutes. Just have a try.