When a 1-week-old child has a runny nose, the first thing to look at is how long the child has had a runny nose and whether there are any other accompanying symptoms. If the child has a runny nose for a relatively short period of time, around 3-4 days or within 1 week, symptoms such as nasal congestion, sneezing and coughing should be highly suspected to be caused by respiratory tract infection, that is, cold, and the child can be given oral cold granules and medicine to clear heat and stop cough, or medicine to clear heat and detoxify. If the child has runny nose for a longer period of time, more than 1 week, it should be considered rhinitis, so the child should not continue to give oral cold pellets, the effect of oral cold pellets will not be particularly satisfactory, you need to use orthodontic drugs, or orthodontic rhinitis pellets or Xiangju pellets, in addition, you can give the child a nasal rinse to clear the nasal secretions, if combined with yellow nasal discharge, you need to add anti-inflammatory drugs. The probability of rhinitis after a cold in the eustachian tube is quite high in children of a young age.