The more common causes of excessive nasal discharge are nasal foreign bodies, acute rhinitis, acute sinusitis and various benign and malignant tumors of the nasal cavity. Most children have more nasal foreign bodies, mostly in children, because foreign bodies stay in the nasal cavity for a longer time, resulting in congestion and edema of the nasal mucosa, thus causing an increase in nasal secretions. Some parents cannot find foreign bodies in the nasal cavity of children in time, so they will look for the reason according to the children having more nasal discharge, thus finding nasal foreign bodies. Patients with acute rhinitis and acute sinusitis often also have more nasal discharge. In the case of acute rhinitis, the nasal discharge is mostly yellow pus if it is a bacterial infection, and mucus at the beginning of a viral infection. Most patients with acute and chronic sinusitis will have a more viscous yellow pus, while allergic rhinitis is mainly clear watery nasal mucus. If various benign and malignant tumors in the nasal cavity grow larger and block the posterior nostril, resulting in the nasal ventilation and drainage function being affected, the nasal secretions cannot be discharged in time, and there will be more snot-like secretions flowing out from the anterior nostril, and most patients often go to the hospital for examination because of this situation, thus finding new organisms growing in the nasal cavity. Therefore, if it is a foreign body that causes excessive snot, it should be removed in time. If it is caused by acute rhinitis or sinusitis, it should be treated with medicine in time. If it is caused by benign or malignant tumor of nasal cavity, timely symptomatic treatment is needed.