What are the benefits of aromatherapy?
Answers from Brent A. Bauer, M.D.
Research on the effectiveness of aromatherapy — the therapeutic use of essential oils extracted from plants — is limited.
However, some studies have shown that aromatherapy might have health benefits, including:
Relief from anxiety and depression
Improved quality of life, particularly for people with chronic health conditions
Improved sleep
https://www.mayoclinic.org/healthy-lifestyle/consumer-health/expert-answers/aromatherapy/faq-20058566