"Qi and blood are full, and all diseases are not born." Chinese medicine believes that qi and blood are the two material bases of life activities. Lu Peiwan, deputy director of Henan Traditional Chinese Medicine Health Care Committee, said that qi is a subtle substance running in human body, which can stimulate and promote the functional activities of organs; Blood is the blood flowing in the meridians, which can nourish the viscera and cheer up the spirit. When the human body is full of qi and blood, it is refreshing, quick-thinking, ruddy, smooth skin, moist hair and flexible joints. Instead, it is prone to problems such as trance, palpitation, joint pain, emaciation or obesity. If you want to know whether your blood is sufficient, you can look for clues from the following three places.