Cause Description
External stressor Physical: change of temperature, noise, fever, radiation, high and low sound etc.
Social: change of economic atmosphere, human relationship etc.
Internal stressor Psychological: tension, anxiety, distress, impatience, anger, hatred etc.
Physiological: fatigue, insomnia, health problem etc.
Homeostasis has a mechanism to put slight changes back in place. Therefore the balance of the body is able to maintain good health. For example, temperature, blood pressure, body fluid, exclusion of virus, repair of a wound and so on.
The analysis of L due to acceptance and synergy considers the flow of thought from internal to external and vice versa, and then does the ascription of the emotion such as emergence and inducement. The broader concept of feelings from emotion and awe correlates with a behavior. The feelings and the behavior are a natural combination because the emotion has the ability to drive people to a behavior. (emotion [inducement + emergence] + awe = feelings →behavior)
On the other hand, I consider industrial fatigue by mental cause from a hygienic standpoint of view. When one suffers stress from work, feelings such as pleasure-unpleasure and likes-dislikes arise momentary and continuously. One can understand this from the behavior exhibited, and when we see the facial expression and the behavior, we can see the tired-look. (fatigue → feelings [momentary + continuously]→behavior)
For example, one example was a virial ear infection that caused severe ear pain in otitis. The sound on the street became very noisy for him and he felt frustrated and seeked a quiet environment. If he would receive early treatment, it might be good, but when it’s not so, the inflammation becomes chronic and a concentration breaks up and he will be antisocial. Therefore, diseases can create combinations such as feelings and behavior.
花村嘉英（2017）「森鴎外の『山椒大夫』のデータベース化とその分析」より translated by Yoshihisa Hanamura