摘要
神經性嗅覺喪失的治療效果往往不盡裡想，德國Thomas Hummel提出嗅覺訓練，以玫瑰、丁香、檸檬及尤加利四種精油早晚刺激患者，可以提高嗅覺改善的比例。後續許多的臨床研究也提供了此種療法改善嗅覺（有28－68%患者經訓練能改善）的證據。後來有更多的研究發現味道的選用不用拘泥於原始的四種味道、每天訓練持續至少12－16周以上效果才看得見，對於病毒感染造成之嗅覺喪失效果最好，外傷性預後較差仍然可以一試，即便是年長者也可以訓練，並且可以搭配其他口服/外用藥物一起治療，以增加病人嗅覺回復的機率。
參考文獻
Kollndorfer K, Kowalczyk K, Hoche E, et al. Recovery of olfactory function induces neuroplasticity effects in patients with smell loss. Neural plasticity 2014;2014:140419.
Nordin S, Bramerson A. Complaints of olfactory disorders: epidemiology, assessment and clinical implications. Curr Opin Allergy Clin Immunol 2008;8:10-5.
Hummel T, Kobal G, Gudziol H, et al. Normative data for the "Sniffin' Sticks" including tests of odor identification, odor discrimination, and olfactory thresholds: an upgrade based on a group of more than 3,000 subjects. Eur Arch Otorhinolaryngol 2007;264:237-43.
Shu CH, Yuan BC. Assessment of odor identification function in Asia using a modified "Sniffin' Stick" odor identification test. Eur Arch Otorhinolaryngol 2008;265:787-90.
Jiang RS, Twu CW, Liang KL. Medical treatment of traumatic anosmia. Otolaryngol Head Neck Surg 2015;152:954-8.