Two-month-old baby with runny nose is caused by the sensitive nasal mucosa and rich capillaries, which are easily stimulated by hot and cold temperature changes as well as various sources of infection, causing congestion and edema of the nasal mucosa, thus manifesting as increased nasal secretions. You can use a hot towel to warm the bridge of the baby’s nose or fontanel, and give children’s special saline nasal spray for local cleaning, which can effectively relieve nasal congestion and the exudation of secretions. At the same time, we should pay attention to temperature changes in the living environment and other changes, as well as the presence of various allergens that induce nasal allergy in babies, such as plant pollen and animal hair dander. Also, pay attention to whether your baby has other accompanying symptoms, such as cough and fever, in addition to runny nose. If there are any of the above symptoms, you should seek medical attention in time to exclude the symptoms of runny nose caused by infection and make a clear diagnosis before treating the symptoms to avoid aggravation.