Having a cold accompanied by green purulent nasal discharge is a common and frequent symptom in otolaryngology. The cause of these symptoms is primarily fungal sinusitis caused by a fungal infection in the patient. When these symptoms occur, it is important to first complete a paranasal sinus CT, electronic nasopharyngoscope, complete blood count, and nasal secretion culture to identify the pathogen causing the patient's illness and make a clear diagnosis. Additionally, timely use of antiviral drugs and medications that clear the throat and open the nasal passages should be administered for symptomatic treatment. For patients with sinus ostium blockage and fungal sinusitis, functional endoscopic sinus surgery is also needed to open the sinus ostium, restore normal drainage between the sinus and the nasal cavity, and thus achieve a cure for the patient's condition.