If children have a yellow nose, it is mainly caused by the following two conditions: firstly, it is caused by children suffering from wind-heat cold, if they are infected with wind-heat evil, it will lead to nasal congestion, yellow pus nose, fever, sore throat and other symptoms, which are more common in summer or after heat. In this case, you can apply the medicine for wind-heat cold at the time. Secondly, anti-rhinitis treatment can be carried out. The reason why children have yellow runny nose is caused by sinusitis. Sinusitis in children not only causes yellow nose, but also leads to dizziness, lack of concentration, headache and so on. For sinusitis, children need to be given timely anti-infection treatment, and if the application of cephalosporin and other anti-infection medication is ineffective, nasal endoscopic surgery should be performed in a timely manner.