Full-term babies can be through more water, back patting and medication to expel phlegm, if the baby has symptoms of excessive phlegm is recommended to correct the symptoms in a timely manner, after a clear diagnosis and follow the doctor’s instructions for treatment. 1. Drink more water: you can feed your child more water, drinking more water can dilute your child’s phlegm, so that the phlegm can be discharged naturally. 2. Pat on the back: Hold the child on the shoulder, place the head on the adult’s shoulder, and with the other hand slightly curved, gently pat the child’s back, which will help the phlegm to be discharged. 3. Medications: If your child has a lot of phlegm that can’t be discharged by drinking water and patting the back, or even if it interferes with breathing, it’s recommended that you seek medical attention immediately, and use medication under the guidance of a doctor, such as taking Ambroxol orally as prescribed by the doctor. Parents are advised to take their children to the doctor to find out the cause of the phlegm and to treat the symptoms. All of the above medications should be used under medical supervision.