A child’s clear nasal discharge that turns yellow is most likely due to a bacterial infection secondary to rhinitis. However, it may also be caused by an upper respiratory tract infection. Children in the case of rhinitis can appear clear nose, this time the mucous membrane of the nasal cavity may have edema, congestion and other symptoms, in this case, it is easy to cause the mucous membrane of the sinus sinuses edema, further formation of the phenomenon of blockage, nasal secretions can not be discharged, it is easy to secondary bacterial infections, resulting in the emergence of children’s clear nasal discharge into yellow nasal discharge. In this case, you can give the baby sputum care, will be sucked out of the secretion, can also be given to the sea saline nasal spray, dilute the nasal secretion, promote its discharge. If you consider the possibility of bacterial infection, you can follow the doctor’s instructions to be amoxicillin and other drugs anti-infection treatment. Children’s clear nasal mucus becomes yellow nasal mucus, may also be the upper respiratory tract infection and other diseases, you can go to the hospital to complete the relevant examination to clarify the situation and take appropriate measures.