Study aim: Determining the effect of aromatherapy with lavender essential oil on anxiety and sleep quality in patients with COVID-19 Design: Clinical trial with control and intervention groups, single blind, randomized block using R software on 60 patients Settings and conduct: This study will be performed on patients with Covid-19 hospitalized in the infectious ward of Afzalipour Hospital in Kerman.The type of blindness in this study is single blind, so that the statistician is not aware of the study groups and the data analyst does not know which data is related to the intervention group and which data is related to the control group. Participants/Inclusion and exclusion criteria: Inclusion criteria: Approved patients with Covid-19, Physical and mental ability to answer questions, Ability to understand and speak Persian, Being able to give informed consent. Non-inclusion criteria: Lack of a healthy sense of smell, Having a history of allergy to lavender essential oil, Having severe dyspnea, Use of sedatives and anti-anxiety drugs, and Suffering from sleep disorders, depression and anxiety before illness Intervention groups: Intervention in this study includes aromatherapy with lavender essential oil for the intervention group. The intervention lasts 3 consecutive nights and each night lasts for 20 minutes. Distilled water is used in the control group. Main outcome variables: Anxiety, sleep quality