Coughing in three-month-old babies is mainly caused by acute upper respiratory tract infection, pneumonia, gastroesophageal reflux and other causes. According to the cause of the disease, you can take general treatment, drug treatment. 1. Acute upper respiratory tract infections: mostly viral infections, which can usually be self-cured without special treatment. Coughing is the body’s normal way of expelling germs, it is not recommended to give children cough suppressants, you can make the throat more comfortable by taking honey or hot pear soup directly. 2. Pneumonia: The typical symptom of pneumonia is a cough, often accompanied by fever, shortness of breath and wheezing. Bacterial pneumonia requires antibiotics such as amoxicillin, and those with wheezing can be nebulized with budesonide nebulizer. 3. Gastroesophageal reflux: Gastroesophageal reflux is also an important cause of cough in babies. Often more obvious at night and early morning, for the irritating choking cough. It can be improved by elevating the head by 30° and lying on the side, and at the same time eating less and more meals. All of the above medications should be used under the guidance of a doctor, avoid self-medication. Three-month-old baby cough, there are other diseases may be, it is recommended to consult a doctor in a timely manner, a clear diagnosis, timely treatment. All of the above medications should be used under the guidance of a doctor.