Level 1: What are the causes of babies’ cough? Coughing in babies is a common symptom that can be caused by a variety of reasons. Common causes include colds, flu, allergies, asthma, pneumonia, etc. In addition, environmental pollution, dry air, inhalation of foreign objects, etc. may also cause babies to cough. Level 2: How to relieve your baby’s cough? For mild cough, you can relieve it by the following methods: 1. Keep the air moist. You can use a humidifier or place a basin in the room to increase air humidity. 2