8-year-old boy day and night cough can be seen in bronchitis, cough variant asthma and other conditions, intervention needs to be decided according to the cause, such as cough variant asthma need to be nebulized and other treatments. 1. Bronchitis: the phenomenon of coughing heavily during the day and night can occur, accompanied by fever, wheezing and so on. Treatment of simple viral infections can use ribavirin and other treatments, the consideration of bacterial infections need to use cefaclor and other antibiotics, such as mycoplasma infections caused by the use of azithromycin and other treatments, and can be taken orally to the lungs and cough synergy and other symptomatic treatment. 2. Cough variant asthma: clinically, there may be severe recurrent cough, mostly dry cough, more obvious at night and after daytime activities, the effect of anti-infective treatment is not good, lung function test may suggest that the airway reactivity increases. Treatment requires regular use of budesonide suspension for nebulized inhalation therapy, along with oral montelukast sodium and other relief. There may be other causes for the 8-year-old boy’s cough during the day and night, such as a foreign body in the trachea, etc. It is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy. If you need to use medication, please follow the doctor’s instructions.