There are many reasons why children sleep and cough with phlegm in the throat, such as acute upper respiratory tract infection, pneumonia, asthma, etc., need to clarify the cause of the disease, symptomatic treatment. 1. Acute upper respiratory tract infection: due to the weaker resistance of children, easy to be infected by viruses and other pathogens, causing acute upper respiratory tract infection, usually accompanied by inflammation of the throat, stimulate the mucous membrane of the respiratory tract, producing a large amount of phlegm, resulting in children coughing and throat phlegm while sleeping, can be used under the advice of the doctor’s treatment of children’s cold and flu granules, etc.. 2. Pneumonia: Pneumonia is caused by viruses, bacteria, chlamydia and other pathogenic microbial infections, which can stimulate the bronchial mucosa, manifested in coughing, wheezing, phlegm in the throat, can be recommended by the doctor, choose acetylcysteine granules and other drugs for treatment, do not use their own medication, and pay attention to the treatment of the period of time to eat a light diet. 3. asthma: pediatric asthma is the most common chronic respiratory disease in childhood, with autoimmune, genetic, environmental, endocrine and other factors, usually accompanied by coughing, chest tightness, shortness of breath, throat phlegm, etc., can be recommended by the doctor, the use of nebulized inhalation of glucocorticosteroid drugs, such as budesonide, to relieve. If the child sleep cough throat phlegm sound situation is more serious, can not get relief, to go to the hospital in time to check, symptomatic treatment.