Currently, there is no evidence-backed research showing any illnesses that can be cured through the use of essential oils or the practice of aromatherapy. The results on the other possible benefits of essential oils as, for example, mood elevators or stress relievers, are more mixed. But most are still inconclusive.

Some oils are toxic, and taking them by mouth could be fatal. Rarely, aromatherapy can induce side effects, such as rash, asthma, headache, liver and nerve damage, as well as harm to a fetus. Oils that are high in phenols, such as cinnamon, can irritate your skin.

Aromatherapists use essential oils to help improve their clients' emotional wellbeing and relieve everyday stresses.

Aromatherapy uses aromatic essential oils to enhance physical and emotional health. It may help manage pain, ease digestion, boost relaxation, improve mood, and relieve menstrual symptoms, among other benefits.