The child coughs half month often bad how should do excuse me

Children cough for half a month is always not improved, need to be clear whether it is caused by a substance allergy cough, if it is caused by allergies, need to identify allergens, and then symptomatic treatment can be. In addition, do not rule out pneumonia, bronchitis and other diseases, can take cephalosporin anti-inflammatory, and with aerosol inhalation treatment cough.