What does "evil" mean in metaphysics?

Traditional Chinese medicine believes that everything is in harmony with yin and yang, and the five elements operate normally, so evil spirits will not invade.

Exogenous pathogens, such as weather changes, people in poor health, or people with cold constitution, are bound to get sick when they are cold and frozen. Traditional Chinese medicine, such as warm ginger soup, is used to dispel this cold evil.

Evil spirits are inherent, "dryness dominates autumn, dryness clears the lungs". This evil will hurt the lungs and cause dry skin. Therefore, dry spirits can be excreted with foreign objects, such as Sydney and honey, or when jogging, walking or doing exercises, breathing fresh oxygen and exhaling turbid gas can improve the circulation of qi and blood in the lungs and make the circulation of qi and blood more.

Others are very angry, and polluted air can easily accumulate in the body, especially when they are angry. Therefore, fire hurts the liver and looks bad. You can fart and burp to drive away evil spirits in your body. The most fundamental thing is not to get angry and not to let evil accumulate.