The baby always dry cough, if for physiological reasons, parents are advised to increase drinking water, reduce stimulating factors; if for allergies, you need to avoid allergens, follow the doctor’s instructions to use cetirizine and other medications; if for gastroesophageal reflux, you need to use domperidone and other treatments. 1. Physiological causes: dry air, fume stimulation, second-hand smoke, air pollution, etc. may stimulate the baby caused by dry cough, cough and environmental factors associated with the large, not accompanied by other discomforts, parents can give the baby an appropriate increase in drinking water, remove the causes of cough improvement. 2. Allergy: baby contact with certain items or eat certain foods after repeated coughing, accompanied by runny nose, tears, rashes, etc., considered as allergies, need to clarify the allergies, avoid allergens. If necessary, follow the doctor’s instructions to use cetirizine and other drugs to fight allergies. 3. Gastroesophageal reflux: due to physiological reasons or abnormalities in the structure of the digestive tract leading to reflux of gastric contents, irritation of the throat caused by coughing, accompanied by acid reflux, belching, wheezing, dyspnea and other symptoms, you need to consult a doctor to clarify the severity of the situation, to avoid eating before going to bed, and sleep with the upper body elevated, and so on. There are many causes of dry cough in babies, parents are advised to combine the severity of the symptoms with the baby, and consult a doctor if necessary. All of the above medications should be used under the guidance of a doctor, avoid self-medication.