Croup is an episodic phlegm and asthma disorder caused by the presence of phlegm in the lung, which is triggered by the presence of a trigger or an induction of evil, resulting in the blockage of phlegm in the airway, the loss of lung suction and lowering, and the struggle of phlegm and gas. The main manifestation of the disease is the sound of roaring in the throat, shortness of breath, or even wheezing and inability to lie down, and it is a disease of deficiency of the root and the symptoms. In terms of treatment, regardless of Western medicine, Chinese medicine attaches great importance to the prevention of croup attacks during the non-acute attack period, while diet and prevention are the key, and Chinese medicine has unique advantages in treating the untreated disease. 1. Pay attention to the use of salt. Some studies have pointed out that salt may be a fatal threat to croup patients. Therefore, croup patients should try to reduce the intake of salt. 2. Beware of food additives. Food additives, especially sulfites and monosodium glutamate, can trigger croup attacks. Sulfites are most commonly found in beer and other alcoholic beverages, shrimp, and fruits (especially apricot fruits). Most restaurants use sulfites to preserve lettuce salads, guacamole, sliced fruit, coleslaw, frozen dunked shellfish, canned foods, pickled products, frozen French fries, potato chips, wine vinegar, apple juice, potatoes, baked goods, salami, and wine. Sulfites can be found in any kind of food, including sodium bisulfite, potassium bisulfite and sulfur dioxide. They are often used to prevent food discoloration and bacterial growth. 3, eat more fresh fruits and vegetables. Eat more fresh fruits and vegetables, nuts, soy products and seeds, oatmeal, brown rice, whole grains and other cereals. And adopt a low-glycemic diet – no sugar but high protein and low carbohydrates. 4, avoid eating scallops, yellowtail, razor clams, shrimp, crab, mustard and other hairy things. Moderate selection of foods that can nourish the lung, spleen and kidney, such as lotus seeds, chestnuts, yams, black beans, walnuts, knife beans, pears, silver fungus, loquat, pig and sheep lungs, etc. Prevention and treatment 1, prevention: focus on the formation of persistent root and the role of triggers, so you should pay attention to the impact of climate, do a good job to prevent cold and warmth, to prevent the triggering of external evil. Avoid contact with irritating gases and allergy-prone dust, pollen, food, drugs and other suspected foreign substances. It is advisable to quit smoking and drinking, and to eat a light and nutritious diet, avoiding cold, fatty, spicy, spicy and hairy food, etc., so as not to hurt the spleen and produce phlegm. Prevent excessive fatigue and emotional stimulation. Encourage patients to choose Taijunkquan, Neiyangong, Ba Duanjin, walking or jogging, breathing gymnastics and other methods of long-term exercise according to their personal physical conditions to enhance physical fitness and prevent colds. 2.Fu Zheng – identification and treatment: Lung deficiency, treatment: tonify the lung and strengthen the body. Prescription: Yu Ping Feng San plus or minus. Spleen deficiency, treatment: strengthen the spleen and resolve phlegm. Remedy: Six Junzi Tang with addition and subtraction. Kidney deficiency, treatment: tonifying the kidney and regulating the body. Prescription: Jin Kui Kidney Qi Pill or Seven Flavors Du Qi Pill plus or minus. If there is no obvious symptom in general, we can use the remedy of tonifying the lungs and kidneys, such as ginseng, astragalus, wu wei zi, pecan meat, cordyceps, zihe cao, and so on, and we can also match with the products to resolve phlegm. In addition, white mustard seed compress method is also effective in reducing and controlling the attacks of croup. The method is to put 20g each of white mustard seeds and Yanhuosuo, 10g each of Gansui and Hossein, and add 0.6g of musk, and evenly, and apply it with ginger juice to the points of Lung Yu, Plastered Heart and Bai Lao in three times in summer, about 1-2 hours, once every 10 days.