So let's look at seven types of common oil, and their benefits. 1) Lavender oil Use: apply a few drops to your pillow when you can't sleep; inhale a drop on a tissue to calm nerves; add some to a ...

A 2007 study reported that repeated topical use of lavender essential oil products may cause prepubertal gynecomastia, which is a rare condition that causes breast development in young boys.