my boy daily have too much cpughing at night and vomits this happens frpm past 5 years. what is the problem

A. If the coughing is severe I think it would be good for you to get examined by the doctor there can be a high possibility that this is some kind of an allergic reaction at the cough is stuck into the throat of your child so better to check with your doctor get an allergy test done so you know the right treatment to follow