Hi Doctor my son is having mucus cough from few days also I had taken medicine from Doctor around 22 days back and Than he started coughing again after 5 days even I had tried some home remedies, in between I had given him same medicine as per Doctor 1 week back but he is still coughing. what should I do. Moreover he is eating like biscuits and other outside sweets. what is the reason of frequently coughing. should I visit to Doctor again aur given him home remedies. I had ordered a humidifier is it good for coughing or not. kindly suggest