There is no such thing as what works best for children with cough and phlegm. Children coughing with phlegm generally need general treatment and medication. 1. General treatment. Need to strengthen the daily dietary care, drink more warm water, eat some light and easy to digest food, such as vegetable porridge, soft noodles and so on. 2. Medication. Children with cough and sputum indicates that there is inflammation in the body, generally can be treated with medication, need to go to the hospital for routine blood tests, if the cough is caused by bacterial infections, you need to use drugs such as amoxicillin, if it is the influenza virus infection, you need to use drugs such as oseltamivir treatment. Since drugs have certain side effects, it is recommended that all the above drugs be used under the guidance of a doctor and not on their own.