A 4-year-old baby with a strong cough can be relieved by ultrasonic nebulization. You can also take pediatric cough and phlegm granules, which can relieve cough and phlegm to relieve cough. At the same time, you also need to actively find the cause of the child’s cough, for the cause of the treatment. If the baby cough is caused by bacterial infection, need to take antibiotics for anti-inflammatory treatment, such as amoxicillin clavulanic acid, if it is due to mycoplasma infection caused by azithromycin granules can be taken. If it is caused by influenza virus, you need to take oseltamivir. If it is caused by other viruses for common cold, you can not use drugs or take antiviral proprietary medicines such as pandan and banlangen granules. If the baby’s cough is caused by allergies, you also need to keep your child away from allergens, and you can treat your child with anti-allergy medications, such as loratadine and montelukast sodium. During coughing, you can also let your child eat pears, which have the effect of clearing and moisturizing the lungs and relieving coughing.