Three-year-old baby coughing at night may be due to laryngitis, may also be due to bronchitis, and may be due to cough variant asthma, different causes, different treatment, more to take medication. 1. pharyngolaryngitis: pharyngolaryngitis is a kind of acute inflammation of the mucous membrane of the throat, three-year-old baby if pharyngolaryngolaryngitis occurs, the symptoms of coughing at night when you sleep, the treatment can be given to anti-infective drugs against the pathogenic bacteria to treat, but also can be given to the acetylcysteine and other medicines to dissolve phlegm. 2. bronchitis: bronchitis is an inflammatory disease of the trachea, bronchial mucosa and its surrounding tissues, three-year-old babies with bronchitis, there can be coughing symptoms, the treatment can be given to anti-infective drugs for treatment, but also can be given to budesonide, aminobromine and other drugs such as nebulized inhalation to reduce coughing, coughing up sputum symptoms. 3. cough variant asthma: cough variant asthma is a special type of asthma, chronic cough as the main manifestation, there is no obvious wheezing, shortness of breath symptoms, three-year-old baby with cough variant asthma, will also appear at night coughing symptoms, treatment can be given to budesonide and other drugs for treatment. If the three-year-old baby appeared at night coughing symptoms continue not to ease, should be timely consultation, in order to clarify the cause of the disease, in accordance with the doctor’s instructions for medication, in order to avoid delays in the condition.