Coughing and wheezing in young children is considered to be caused by bronchitis, asthma and other reasons. 1. Bronchitis: when infected by pathogenic bacteria (such as viruses, Mycoplasma pneumoniae or bacteria, etc.), bronchitis can occur, coughing and wheezing with phlegm chirping, but also accompanied by nasal congestion, runny nose, and other symptoms. 2. asthma: chronic cough as the main feature, in the acute stage may have wheezing phlegm sound attack, need to actively use drugs to control asthma. Young children coughing and wheezing sound, there may be other causes, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment, do not self-medication.