How does 3 months darling catch a cold throat to have phlegm to do

Three-month-old baby suffering from a cold, there is sputum in the throat, you can feed the baby more water, pat the back and other ways to promote the child to discharge sputum; if the effect is not good, you need to carry out atomization inhalation treatment, can help the baby dilute sputum, so as to achieve the purpose of alleviating the disease.