People's mood is a psychological phenomenon. Happiness, cheerfulness, joy, relaxation, satisfaction, sadness, fear, fear, anxiety, tension, distress and melancholy are all emotional activities.
Emotions can be divided into positive emotions and negative emotions.
Positive emotions are good for health, while negative emotions will affect physical and mental health. China has said since ancient times that people are sad when they are happy, but anger hurts the liver, thinking hurts the spleen, worrying hurts the lungs, and fear hurts the kidneys. It can be seen that Chinese medicine attaches great importance to the relationship between human emotions and health. When people's emotions change, they are often accompanied by physiological changes. For example, when people are frightened, there will be a series of changes such as dilated pupils, thirst, sweating and pallor. These physiological changes are all under normal circumstances.