More than 40 days of the baby occasionally cough is common in the baby by the stimulation of the external air, such as cold, heat or more stimulating odor; second is the baby respiratory mucosa mild congestion, edema and cause reflex cough; three more common in the pathogen invasion to the baby’s body, and the occurrence of upper respiratory mucosa congestion, edema, inflammatory substances seeping out of inflammatory reaction. This time pay attention to keep warm, avoid the baby cold. You can use a hot towel to apply warm compresses to the baby’s fontanel without burning the baby’s skin. Continue breastfeeding, breastmilk itself contains a large amount, rich in immunoglobulins and natural antibacterial factors, enough to resist helping your baby with these pathogens. Do not give your baby any medication for the time being and follow up anytime.