1. Introduction
Chronic cough is one of common and frequently-occurring diseases in children. It refers to those who cough for more than 4 weeks [1], cough is the main or only clinical manifestation, and chest film shows no obvious abnormality. According to the nature of cough, it can be divided into dry cough and wet cough.
A long-term cough without definite diagnosis and repeated use of antibiotics will cause significant impairment to the quality of life, including children’s sleep, school attendance and play and parents’ experience distress and anxiety [2-4].
Therefore, we studied the constituent ratio of various causes of chronic cough in children, analyzed and sorted out their medication history, in order to improve the diagnosis and treatment of non-specific chronic cough by pediatricians.