How does the child of 3 months cough to have phlegm to do

Three months old children cough sputum is mostly caused by upper respiratory tract infection, it is recommended to use cough syrup, loquat lotion and other drugs under the guidance of doctors to alleviate symptoms, if necessary, also need to go to the hospital for atomization treatment. Parents need to feed the baby more water, keep indoor temperature and humidity appropriate, frequently open windows ventilation.