“…Mental rumination is a disease, according to International Classification of Diseases -11 th edition (World Health Organization, 2020), coded as MB24.E Mental rumination and it represents mental preoccupation with negative events, negative personal characteristics, or failures. Mental rumination means sinking into thoughts over and over a problem, thinking over and over about a stressful event, a stressful situation (Emmett et al, 2019;Gassling et al, 2012;Heim, 1995), presence of intrusive thoughts (Hörlesberger, 2016), obsessive thoughts on what has happened (Emmett et al, 2019;Harzer & Ruch, 2015), constant rethinking of the problem without reaching a clear conclusion and solution, aimless thinking about the problem (Heim, 1995;Heim et al, 1991), excessive persistence (Balcar et al, 2011;Holubova et al, 2018) and perseveration in thoughts, rethinking repeatedly a stressful event (Balcar et al, 2011;Gassling et al, 2012;Holubova et al, 2018), constant thinking about the situation so that the person cannot be distracted from it (Emmett et al, 2019;Harzer & Ruch, 2015), the person finds it difficult to think of something else (Götz, 2003). Rumination is expressed as repetitive negative thoughts about own negative emotional experiences, and reflections on their causes, consequences, and symptoms (Dzhambov et al, 2019).…”