There is phlegm in the child throat of a month, how does a few cough do

A month child throat sputum accompanied by a slight cough, parents should ensure that the child's water supplement, adhere to breastfeeding, promote the child's absorption of calcium; at the same time consider is caused by tonsillitis, do not rule out the possibility of acute pharyngitis, should go to the regular hospital children respiratory department to do blood routine, laryngoscope examination.