If your newborn is under 6 months old, try not to use medication at this time, but you can use some other methods of treatment. You can use suction or nebulization, both of which can achieve anti-inflammatory, cough and phlegm relief. As a parent, you can pat the baby’s back to loosen the phlegm, which can also make the phlegm expelled from the body. If older, this time can be appropriate medication, usually with anti-inflammatory drugs, such as taking fresh bamboo oral liquid, or paediatric hematoxylin granules. In severe cases, further examination may be required to identify the cause of bacterial or mycoplasma infection, and then decide on the appropriate treatment plan.