We were told to learn our child's cough -- is it post-nasal, reflux, bronchial... DS rarely coughs unless he's coming down with something and he's 5. Never coughed as a baby except a few times when he got an upper respiratory infection -- he wheezed -- and we were told to "beat that cough out of him". He also had more sinus issues his first year -- stuff would run down his throat and make him cough...