According to the World Health Organization, mental health is defined as “a state of well-being in which the individual realizes his or her own abilities, can cope with the normal stresses of life, can work productively and fruitfully, and is able to make a contribution to his or her community.”
Many internal and external factors contribute to cognitive and emotional well-being, including relationships with loved ones, financial issues, work environment, and coping behaviors/skills. When one or more factors prove overwhelming, acute (anger, anxiety, depression) or chronic stress may result.
From: https://www.healthiergeneration.org