Coronavirus disease 2019, abbreviated: COVID-19, is a viral disease caused by the new coronavirus SARS-CoV-2. Due to the SARS-CoV-2 pandemic, many countries around the world have carried out various interventions to reduce the spread of infectious diseases. One of these interventions was lockdown, ie staying at home. Such restrictions were established with the intention of reducing the spread of infectious diseases. According to the World Health Organization, by April 2020, almost half of the entire population was under lockdown. Mental and physical health make up the overall health of an individual. Mental health problems can occur if a large number of challenges suddenly arise, especially now during a pandemic, such as caring for one's own health and the health of loved ones, how to organize work from home due to lockdown, how to withstand reduced contact with family and friends. OBJECTIVE: The aim of the study in this paper was to find out whether the mental and physical health of the population deteriorated during the lockdown. RESULTS: Research on whether lockdown had an impact on a person's mental and physical health was conducted through an online survey, on a sample of 209 respondents in the period from 15.12.2021-15.01.2022. years. 68% of respondents said that lockdown affected their mental health, as many as 56% of respondents said that their mental health deteriorated after the lockdown, and 33% of respondents said that their physical fitness deteriorated after the lockdown. The results of the research show that the introduction of lockdown in a large part of the population has led to a deterioration in mental health and stagnation of physical health. CONCLUSION: The entire health of an individual consists of mental and physical health and well-being, and it is necessary to direct the awareness of the entire population to care for them, especially due to the current situation of the pandemic in which we find ourselves. It is important that the nurse / technician promotes mental health care and a healthy lifestyle through educational and promotional materials, various actions and educations. It is also important to provide help and assistance to the person through a multidisciplinary approach.