The baby coughs with phlegm and asthma, most of which are caused by respiratory tract infection. Oral medicine or atomization treatment can be taken. If your baby coughs and has too much phlegm, you can take Xiaoer Zhike Huatan Granule, Ambroxol Oral Liquid, Juhong Granule, etc. orally, or you can take atomization treatment. Then there is the baby's cough, phlegm and asthma, which are related to the airway hyperresponsiveness. You can use anti allergic drugs, such as montelukast sodium chewable tablets. Baby cough, phlegm, asthma, often caused by respiratory virus or bacterial infection. It is necessary to confirm the diagnosis according to chest X-ray or blood routine test, C-reactive protein test, and take anti-inflammatory or antiviral drugs. Keep your baby warm and eat light food that is easy to digest.