The author's analysis refers to emotional skills (EI) among adolescents in the context of cumulative fatigue. Ninety-two young people aged 16-18 were examined. The following measures were used: the Polish modification of Cumulative Fatigue Questionnaire by R. Kosugo, and Questionnaire INTE N.S. Schutte and others. The relationship between cumulative fatigue and EI is signify cant. EI differs and diminishes with the growth of the fatigue level. The rise of fatigue is associated with the tendency to decrease one's abilities to use emotions in action. 'Being in harmony with others' is characteristic of young people with severe fatigue. The results underline the importance of understanding oneself and using emotions in one's life in the best way.