Twenty years ago, Carla Cohen fell mysteriously ill.

She couldn’t put her finger on what was wrong; it felt as though some conspiracy between her mind and her body were eroding her capacity to work.

Cohen, who was an entertainment executive in Los Angeles, woke up every morning feeling weak and foggy-brained, with a low-grade fever.

https://www.newyorker.com/magazine/2017/10/09/how-essential-oils-became-the-cure-for-our-age-of-anxiety