Changes in environmental conditions and lifestyle lead to an increase in modern civilization diseases. Stress plays a significant role in this, as it affects and disrupts many regulatory systems in the body, such as the immune system, nervous system, and gut health. 

With the help of psychoimmunology, the connections between biological, somatic, and psychosocial processes, as well as their impact on the brain, behavior, and experience, can be better explained. Here, it is important not only to identify the "stressors" that make one tired and ill but to learn how to cope with them in order to regain strength, vitality, and better health.