Yellow discharge from the nose may be caused by sinusitis, acute rhinitis secondary to bacterial infection, atrophic rhinitis and other diseases. 1. Sinusitis: yellow discharge from the nose can be considered sinusitis, sinus mouth is relatively small, snot stays in the sinus cavity for a long time and is not easy to flow out, combined with bacterial infection, there will be yellow discharge. At this time there is nasal congestion, dizziness and other discomforts. 2. Acute rhinitis secondary bacterial infection: yellow discharge from the nose may be acute rhinitis, this disease is caused by viral infections, when secondary bacterial infection, the nasal cavity will be congested and edema, may be from the clear snot to yellow discharge. 3. Atrophic rhinitis: this disease can be characterized by nasal mucosal atrophy, glandular atrophy and localized crusting, etc. There is yellow discharge and crusting in the nose when infected with stinky nose bacillus. Yellow discharge from the nose should actively go to the hospital, after a clear diagnosis of standardized treatment.