There is always yellow sputum in the nasal cavity, consider with sinusitis, maxillary sinus cyst, rhinitis and other diseases. 1. Sinusitis: usually due to sinusitis, resulting in sinus mucosal edema, congestion, inflammatory exudate, and then there is always yellow sputum in the nasal cavity, sinusitis may also appear nasal congestion, pus and other symptoms, can be used under the guidance of the doctor cefixime dispersible tablets, cephradine capsules and other medications to treat. 2. Maxillary sinus cyst: usually due to maxillary sinus cysts, resulting in uninterrupted flow of yellow secretions in the nasal cavity, and then there is always yellow sputum in the nasal cavity. Maxillary sinus cysts usually appear breathing restrictions, headache, maxillary sinus area pressure pain and other symptoms, can be prescribed to take the nasal endoscopy combined with fiber laryngoscopy surgery and other surgical procedures to treat. 3. Rhinitis: may be due to rhinitis stimulate the secretion of more purulent secretions, which in turn causes the phenomenon of yellow phlegm in the nasal cavity. Rhinitis may also cause nasal congestion and runny nose, which can be treated with medicines such as budesonide nasal spray as prescribed by the doctor. If the phenomenon of yellow sputum in the nasal cavity, there may be other reasons, need to go to the hospital for further examination to clarify the cause of the disease, and timely medical treatment. Daily attention should be paid to rest, avoid overwork, appropriate exercise.