Thick yellow nasal discharge from the nose may be caused by colds and rhinitis secondary to bacterial infection, sinusitis and other diseases. 1. Cold secondary bacterial infection: If the patient suffers from a cold, secondary bacterial infection may cause the patient to have yellow thick nasal discharge, cough and other symptoms. 2. Rhinitis secondary bacterial infection: if the patient suffers from rhinitis, secondary bacterial infection, may appear nasal congestion, sneezing, nose with yellow thick nasal discharge and other symptoms. 3. Sinusitis: Acute sinusitis and chronic sinusitis are both bacterial infections, and common symptoms include thick yellow nasal discharge from the nose. Patients with yellow thick nasal discharge, there may be a foreign body in the nasal cavity secondary bacterial infection, nasal cavity – sinus malignant tumors, etc., it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor standardized treatment.