It is best not to turn on the air conditioner when your baby has a cough, because the air conditioner will cause the air to be drier after it is turned on. The dry air will stimulate the respiratory mucosa, causing the mucosa to dry out, and there will be a certain amount of irritation that will aggravate the cough. It is best to drink more water and then add a humidifier in the house, which is good for relieving cough. The filters of air conditioners are often not cleaned properly, which can breed mites or bacteria or viruses. Turning on the air conditioner often causes air pollution, which may aggravate or induce new respiratory tract infections to appear, which in turn can aggravate the symptoms of coughing, especially allergic coughs. It is not recommended to turn on the air conditioner during coughing. It is recommended to drink more water and use cough and phlegm medicines for treatment, for example, you can give your baby oral aminoglutethimide solution or lung power cough combination for cough and phlegm treatment.