<unk>  is based on the usage of aromatic materials, including essential oils, and other aroma compounds, with claims for improving psychological or physical well-being. It is offered as a complementary therapy or as a form of alternative medicine, the first meaning alongside standard treatments, the second instead of conventional, evidence-based treatments.<unk> sts, people who specialize in the practice of<unk> , utilize blends of supposedly therapeutic essential oils that can be used as topical application, massage, inhalation or water immersion. There is no good medical evidence that<unk>  can either prevent, treat, or cure any disease. Placebo-controlled trials are difficult to design, as the point of<unk>  is the smell of the products. There is disputed evidence that it may be effective in combating postoperative nausea and vomiting.
Aromatherapy
Hypnosurgery
Electrosurgery
Tourniquet
Vagotomy
Microwave ablation
Pulsed radiofrequency
Sympathectomy