Just my opinion.

When it comes to diseases or ailments that are caused by pathogens or physical damage (broken bones, cancer, etc.), then I can't see where aromatherapy would be of any use. However, if it makes you feel happy then by all means supplement the rational methods with it. Beaver castor, faint essence of skunk and such would be my recommendation.

However, if a person's head ailments are head related; stress, anxiety, etc., then aromatherapy might be a great tool. The power of suggestion/placebo effect are not to be discounted entirely. Aromatherapy and good counsel would probably be much better than drugs and psychotropics that just seem to really mess up so many people.

I have a friend who worked at the soda fountain of a local drugstore in the 50's. He says the local drunks would come in the morning for a shot of ammonia water. That would be aroma therapy to me