RESUMEN
As the coronavirus disease 2019 (COVID-19) pandemic has spread, so has the psychological impact of the disease been felt worldwide. Despite this, the mechanisms of COVID-19-related psychological problems and mental disorders remain unclear. As such, effective therapeutic schemes or intervention strategies cannot be developed. It is, therefore, necessary to establish a theoretical basis of psychological problems and mental disorders related to public health emergencies such as COVID-19. Herein, the potential mechanisms of occurrence and development of COVID-19-related psychological problems and mental disorders have been discussed from two angles: the pandemic as a public health emergency itself and the extensive quarantine situation during the pandemic.