Three-month-old babies are prone to phlegm when coughing occurs. Although coughing and phlegm is a normal physiological behavior to excrete undesirable substances, it often makes parents worry. Let’s learn how to deal with it: 1. Drinking water treatment method As coughing makes the baby’s respiratory duct water easy to lose, the lack of water in the trachea will aggravate the symptoms of coughing and is not conducive to the discharge of phlegm, drinking water helps moisten the trachea to moisten the phlegm and achieve the purpose of simple cough expectoration. 2.Patting the back method When it is difficult to get out the phlegm from the baby’s cough, you can let the baby lie down on its side and then gently pat the baby’s back with an empty fist-like hand, which can easily loosen the phlegm in the throat and facilitate coughing out the phlegm. 3.Medication Cough with phlegm, if the effect is not obvious with the above methods, medication should be carried out. First of all, we should see if the baby’s throat is inflamed. If the pharynx is congested and red, you can take medication to benefit the throat. If the baby’s tongue is thick, you can use medicine to relieve phlegm and cough to clear the lungs. There are many ways to deal with phlegm in the throat of a three-month-old child, but when using it, you need to pay attention to the appropriate strength when patting the back, and take medication under the guidance of a doctor, not to buy medication without permission.