In the clinic, we often see such a class of patients: one is often feel fatigue, a little physical, mental activities, feel tired panic; two is very easy to catch a cold, almost one or two months to catch a cold, or even more often, as long as someone around the cold, most will be infected with him (her); three is easy to mouth ulcers, or even ulcers continuously, or at the same time have several ulcer points; four is often dry mouth, especially when waking up at night is very obvious, drinking water can only play a temporary role. Especially when waking up at night is very obvious, drinking water can only play a temporary role in quenching thirst; five is moving then sweating, and some have night sweats. If you look at the tongue of such patients, you will see that most of them have a light red and tender tongue with varying shades of fissures and thin or flaking moss. According to the theory of Chinese medicine, such patients belong to the evidence of Qi and Yin deficiency. The cause of this condition varies from person to person. In the case of young adults, it is mostly related to hard work, stress, and not getting enough rest for a long time. The body is always in a state of overload, and it is easy to consume Qi and hurt Yin. From the perspective of children and teenagers, most of them are related to their weak constitution and frequent illnesses in their early years. Repeated illnesses, especially respiratory illnesses with fever, are also very damaging to the qi and yin of children and adolescents with pure yin and yang bodies. The deficiency of Qi and Yin in the elderly often does not occur alone, but is often accompanied by stasis, phlegm, dampness and other concurrent evidence, which is very much related to their suffering from certain chronic diseases. In terms of treatment, for mild Qi-Yin deficiency, we often use Yu Ping Feng granules, Sheng Wei Wei Drink and other corresponding Chinese medicines, and pay attention to avoid strain and long-term stress, and eat a light and nutritious diet. For patients who are more seriously ill, especially those with other illnesses, they need to be treated with Chinese herbal medicine instead, and adjust the medicine according to the changes in their condition, and then use Chinese medicine to consolidate the effect after their condition is stabilized. Patients often ask what dietary supplements are available in general. Is it okay to take supplements? For these patients, it is important to eat a light diet and not to consume spicy and hot foods such as chili, wine, mutton, garlic, onion, pancakes, doughnuts, cinnamon, etc. You can eat yam, lotus seeds, lentils, white fungus, lily, honey and other foods that benefit the qi and strengthen the spleen and nourish the yin and moisten the lung. As for supplements, western ginseng, raw sun ginseng and prince’s ginseng are more suitable, while red ginseng is not suitable for use. In addition, some multivitamins can be appropriately supplemented.