A series of pathological changes caused by deficiency of vitality in human body are called qi deficiency. Qi is the most basic substance of human body, which consists of essence in kidney, qi absorbed and transported by Shui Gu's spleen and stomach, and air inhaled by lungs. Clinically, qi deficiency also includes lung qi deficiency, heart qi deficiency, spleen qi deficiency and kidney qi deficiency.

Compared with modern medicine in etiology, symptoms and pulse conditions, qi deficiency is very similar to the concept of "sub-health" in modern medicine. The root cause of sub-health is deficiency of both yin and yang, qi and blood, and low function of five internal organs, which is also consistent with deficiency of vitality. In the overall concept of TCM and the principles and methods of syndrome differentiation and treatment, the heart, liver, spleen, lung and kidney are adjusted as a whole, so that the body can regularly renew itself and replicate itself, gradually restore its vitality, and also turn the sub-health state into a healthy state.

The following medicines and foods can be used: 1. Yam and coix seed tea should be boiled in San Qian, which can make your stomach full, your spirit good and your face good. However, it should be noted that the real yam is white. If it is purple or red, the effect is limited to eating it as a sweet potato. Second, Shen Si soup with lotus seeds, coix seed, yam and Euryale ferox is a healthy diet for people with qi deficiency. Some people are used to adding pig intestines or ribs and chicken to Shen Si soup. Modern people are afraid of overnutrition and obesity, and they can also remove the attached fat before cooking. Third, the coix seed powder soaked in milk can prevent cancer and moisturize skin. You can stir-fry it a little, grind it into powder and soak it in milk.