Aromatherapy has been touted to relieve many maladies. My suggestion is to pick two or three that interest you and search the literature to evaluate the volume of literature available. There are many studies related to treatment of nausea (for example), although the N is often small and the quality is often low. A review containing a small number of low quality studies would not yield much value for the effort you will need to put forward. IMHO.
Hi headache (migraine more specifically) is reasonable. There are 3 clinical trials that come to mind and there is not a previously published review. Best Jonathan
thank you, but I think after research, if I write a systematic review on aromatherapeutic properties of a plant is better than a malady. like Rosemary or Thyme or ...