Children with excessive nasal discharge after influenza A may be caused by rhinitis, sinusitis, allergic rhinitis. Influenza A is a respiratory disease caused by influenza A virus, influenza will trigger viral rhinitis, runny nose is mainly due to nasal mucosal congestion, edema and plasma exudate, followed by mucosal epithelium shedding, regeneration, about two weeks after the repair and healing, so a lot of children with influenza has entered the recovery period, and there is still nasal congestion, runny nose, and other rhinitis manifestations. In addition, snotty nose may also be the combination of influenza A sinusitis, allergic rhinitis. Need to be analyzed in conjunction with the symptoms, sinusitis children will appear repeated nasal congestion, runny nose, head and face of the stuffy feeling and sinus area pressure pain. Allergic rhinitis children will have a clear runny nose, nasal congestion, nasal itching, sometimes accompanied by itchy eyes. After a child’s A-flux should be closely monitored for comorbid symptoms, and it is recommended to choose a targeted treatment under the guidance of a doctor.