As we enter spring, there is a significant increase in the number of children with respiratory diseases. Anti-inflammatory symptomatic treatment of children suffering from upper respiratory tract infections, bronchitis and bronchopneumonia is usually curable in 7 to 10 days. However, some children with fever and cough symptoms disappear but still have phlegm in the throat and phlegm whirring in the throat, which causes some pain to the child and parents are particularly anxious. In fact, this situation can be caused by most reasons, especially children with allergies are prone to it, some children have eczema or rickets, laryngeal spasms, easy to be frightened, sweating a lot, weakness of the body increases the secretion of phlegm in the throat and can not be discharged, because the child is small will not spit on their own, in time when the temperature changes parents do not increase or decrease clothes with the air temperature leading to the appearance of some symptoms. Some patients are often diagnosed as bronchitis or wheezing bronchitis in primary hospitals, and doctors prescribe some anti-inflammatory drugs to be taken orally, but it is difficult to remove the mucus secretion from the larynx, even if the child is given a chest X-ray, it only shows thickening of the chest texture and no obvious change in the white blood cells, so why is it not easy to remove the phlegm from such children? There is a close relationship with some nutritional diseases. In children with allergies, I found that their parents or grandparents have a history of asthma or allergic rhinitis. The chance of bronchial asthma in such children increases significantly, and whenever the onset of this symptom occurs early with the change of seasons or when there is some kind of trigger to induce the disease, it is necessary to use some anti-allergic drugs if we want to remove the phlegm chirping in the throat, and at the same time the phlegm can get better results to stop the cough. It is not necessary to treat with antibiotics to avoid adverse drug reactions. Some fat children are also very prone to phlegm in the throat. Ancestral medicine considers such patients to be spleen deficiency, and patients with spleen deficiency are prone to obesity. “Fat people produce phlegm”. Since phlegm and dampness are in the body and cannot be easily discharged, some herbs that strengthen the spleen and transform dampness should be used to regulate such patients. Especially for children with rickets, the lack of vitamin A, D or calcium in the body makes it easy to have laryngeal spasm, so that phlegm cannot be discharged normally, and some children even tend to have phlegm obstruction and suffocation. For such children, vitamin A, D and calcium should be supplemented in time to eliminate the bronchial spasm in the larynx as soon as possible to reduce the stimulation of phlegm in the larynx. For some patients with imbalance of trace elements, because some of them have reduced iron, zinc and selenium in their bodies due to partiality and sweet tooth, due to the lack of raw materials for blood production, resulting in the body’s resistance, loss of appetite and easy to catch a cold, these children must promptly adjust the diet structure, correct the problem of partiality, and at the same time supplement rich food containing iron, zinc and selenium, if it still cannot be improved, they must be supplemented with drugs. As long as the child has a good spirit B, can eat, and does not cough,] PS! Of course, the only way to truly and completely cure a cough is to treat the primary cause. In addition, the diet should focus on lightness and refreshing taste. Fresh vegetables such as bok choy, cabbage, radish, carrots, tomatoes, etc. can supply a variety of vitamins and inorganic salts, which are conducive to the repair of the metabolic functions of the organism. Soybean products contain high quality protein, which can replenish the tissue protein lost by the body due to inflammation, and does not increase the phlegm and help moisture. You can also add a small amount of lean meat and other protein-rich foods. The dishes should avoid too salty, try to steam and boil, do not fry fried braised. As the saying goes, “Fish produces fire, meat produces phlegm, vegetables and radishes keep you safe.” When a child has a cough, a little attention is beneficial to the child’s early recovery.