Simply put, face-to-face diagnosis is a method to understand the diseases and health status of viscera through facial reflex zone, mainly by observing the color changes of various parts of the face to understand the physiological and pathological changes of internal viscera. The complexion is the representation of qi and blood of zang-fu organs, and it is also the reflection of disease changes. Normal people's face is yellowish, ruddy and slightly shiny, which is called "normal color". When you are sick, the luster of your skin will change, which is called "sick color". If the complexion is dark, it is mostly extroverted, yellow is spleen color, green is liver disease, white is lung deficiency and red is heart fire. What is particularly valuable is that by visiting different parts, the location of the disease can be further determined. For example, black eyes are mostly kidney diseases, black eyes are liver diseases, red cheekbones are heart diseases, yellow nose is asplenia, and white Tang Yin is a lung disease. Therefore, color diagnosis is of great significance in the qualitative and localization of diseases. Doctors can determine visceral diseases according to the face-to-face chart and then through the change of color. For example, red, cardiovascular and cerebrovascular problems, yellow liver problems, the color of eyes and lips can also be seen. In addition, hand diagnosis is scientific and even more accurate than instruments. Hand diagnosis refers to a method to diagnose diseases by observing the changes of palm print, palm color and palm shape. It is essentially different from palm reading. According to the theory of traditional Chinese medicine, the human body is an organic whole, and the part and the whole are dialectical unity. The two are closely related and inseparable. Therefore, when diseases occur locally in the human body, they often react in other parts of the human body. "Huangdi Neijing Lingshu Ben Cang" records: "If you do something inside, you must do something outside" and "If you know its viscera, you will know its disease". As a branch of traditional Chinese medicine, hand diagnosis has existed since ancient times. In the Qing Dynasty, the method of diagnosing and treating diseases through the palm was described in detail in "Generalized Massage for Children".