A cough is a sudden forcing of air from the lungs. It is a common symptom of illness. A cough helps gets infected fluid out of the lungs. Your child may have a dry cough or a wet cough. A wet cough is when your child coughs up mucus.
Most coughs are caused by a viral infection of the trachea (windpipe) or bronchi (larger air passages in the lungs).
Cough and cold medicines are not as helpful as honey. Do not give them to children under 4 years old. Coughing helps protect the lungs by clearing out germs.
Fluids. Make sure your child drinks lots of water. This loosens mucus and prevents dehydration.