The theory of Yin and Yang in Chinese medicine

The theory of Yin and Yang applied by traditional Chinese medicine originated from ancient Chinese philosophy. The effective application practice in traditional medicine shows the vitality of the old theory.

Qi is the basic substance of the world in ancient Chinese philosophy. In the broad sense, Qi divides into Yin and Yang. Lower, cold, dark, or less active things are classified as Yin, while upper, warm, bright or active things are classified as Yang.

In the theory of traditional Chinese medicine about the internal organs of the body, the concept of Qi is frequently applied in the narrow sense. Qi is an active substance which is different from Yin but is close to Yang.

The unbalance of Yin and Yang

Broadly speaking, the body of a human has Yin and Yang. If Yin and Yang are unbalanced, the person feels sick.

If Yang is excessive, the person feels hot and irritable. His face is red, and sometimes even his eyes are some red. He wants to drink cold water. His tongue is red, and the tongue fur is yellow. His urine is yellow, and his feces are dry. His pulse is rapid.

If Yin is excessive, the person feels cold, and likes to stay in a warm environment. The color of his tongue is light, and the tongue fur is white. His feces are watery. His abdomen feels cold and painful, but he refuses to press the pain point. His pulse is tight or slow.

If Yang is deficient, the person feels cold. He is less active, and he is lethargic. His feces are unformed. His urine is colorless and the amount of urine more than normal. His abdomen may feel uncomfortable. When pressing his abdomen or using a hot compress, his abdomen feels better. His pulse is sunken and slow.

If Yin is deficient, the person feels hot and fidgety. His cheeks may be flushed, and he has night sweat. His throat feels dry. his tongue fur is less than normal. His pulse is thin and rapid.

Restore the balance of Yin and Yang

The basic principle of treatment is to strengthen the deficient and weaken the excessive.

In general, the medicinal materials of cold or cool attribute are used to reduce the excess of Yang, and the medicinal materials of hot or warm attribute are used to reduce the excess of Yin.
For strengthening the deficient, it is very important to judge which internal organ loses the balance of Yin and Yang. Heart, Liver, Spleen, Lungs, and Kidneys are called five internal organs in traditional Chinese medicine. Each of the internal organs has Yin, Yang and Qi. Because each internal organ has different functions, the unbalance of Yin and Yang has special characteristics. Therefore, there are various methods of strengthening the deficiency.

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