“Although research suggests that essential oils may have some health benefits, it is important to remember that the Food and Drug Administration (FDA) does not monitor or regulate the purity or quality of these. A person should talk with their healthcare provider before using essential oils, and they should be sure to research the quality of a brand’s products. A person should always do a patch test before trying a new essential oil….
One 2016 study found that 34.7% of people experienced adverse health effects as a result of exposure to artificial fragrances: migraines, headaches, asthma attacks, breathing difficulties, and contact dermatitis” — Medical News Today
2016 Study: Fragranced Consumer Products: Exposures & Effects from Emissions