Read more about aromatherapy and stress and tension at Johns Hopkins.
Promising review: “I will start this by saying, I am not one to try herbal remedies of any kind. However, this had good reviews and my husband is always looking for eucalyptus-smelling scents. The first time I tried this, both my husband and I tested it in a car ride, both fully expecting it not to work. We put it on our foreheads as directed and went about the car ride. Then 5–10 minutes later, I realized my (very bad) headache was much better. Out of nowhere, I said, ‘So does your head feel…’ and my husband blurted, ‘Better?? Yes!!’ We were both shocked. I ended up giving mine to my mom for a trip she was taking and bought another one. I’ve since used it a few more times, and it does not get rid of a headache but definitely lightens the pressure.” —Stacy S.
Get it from Amazon for $12.95.