A Clinical Study on the Effects of Inhalation of Volatile Oil of Cang-Ai Via the Nose on Patients With Depression

In this study, 60 depressed patients who meet the criteria will randomly be divided into a test group and a control group, with 30 patients in each group. The test group will be given Volatile oil of Cang-Ai (hereafter referred to as CAVO) for inhalation and the control group will be given Bergamot for inhalation. The observation indicators are that after one and two sessions of the intervention, the patients\' blood pressure, heart rate, depression scale scores, and changes in functional near-infrared spectroscopy(fNIRS). This randomized controlled trial will be used to look at the clinical efficacy of CAVO in patients with depression.