There are two common clinical reasons for baby boils: 1. Inflammation stimulates the nasal mucosa, causing an increase in secretions, which can be caused by viruses or bacterial infections. Virus is more common, manifested as a kind of plasma exudate, like the common name of clear water nasal discharge, while bacterial infection is often a kind of purulent exudate, according to which you can also initially determine the cause of the pathogenic infection of the runny nose, of course, clinically there may also be sneezing, coughing and other situations. 2, may be allergies, many children are now also more common allergies, may be to some smell, pollen, or a certain In this case, avoiding allergens or using anti-allergy treatment will have a more satisfactory effect, while other treatments may not be as effective as desired, so it is important for doctors to analyze and judge the clinical preliminary analysis of children with runny nose.