Orange nasal mucus is considered to be bacterial infection of nasal cavity, such as acute rhinitis secondary bacterial infection, acute sinusitis, etc. In addition, nasal sinus tumors such as involutional papilloma can also appear orange nasal mucus. 1. Acute rhinitis secondary bacterial infection: the primary factor of this disease is viral infection, commonly rhinovirus, at first there is nasal congestion, running watery mucus, sneezing and other manifestations, if there is a bacterial infection, the watery mucus gradually becomes mucus, mucopurulent or purulent, the nasal mucus presents orange or yellowish white mucus. 2. Acute sinusitis: mostly secondary to acute rhinitis, the nasal mucosa is swollen, congested, with increased exudation and infiltration of inflammatory cells; when the pathological changes are aggravated, the epithelium is necrotic and the cilia are detached, so the nasal mucus is purulent or mucopurulent. 3. Nasal sinus tumor: such as nasal sinus involutional papilloma, often appearing in one side of the nasal cavity persistent nasal congestion, progressive aggravation, may be accompanied by pus snot, occasionally bloody snot. Nasal snot orange color presenting purulent or mucopurulent need to seek medical treatment in time to remove the cause of the disease.