(1) physical properties. The constitution of yin deficiency is characterized by emaciation, flushing in the afternoon, scanty fluid in the mouth and pharynx, restless mood, fever in hands and feet, lack of sleep, dry stool, yellow urine, intolerance in spring and summer, excessive drinking, rapid pulse, red tongue with little coating.

(2) diet aftercare. The principle of diet conditioning is to protect yin and suppress yang, and avoid light foods such as sesame, glutinous rice, honey, dairy products, sugar cane, vegetables, fruits, tofu and fish, and deliberately eat Adenophora adenophora porridge, lily porridge, wolfberry porridge, mulberry porridge and yam porridge; If possible, eat bird's nest, tremella, sea cucumber, mussel, nail fish, cordyceps sinensis, crab meat, old duck and so on. Eat less spicy and dry products such as onion, ginger, garlic, leek, onion and pepper.