Nasal congestion with phlegm is commonly associated with colds, rhinitis, sinusitis and other diseases, and the cause can be clarified through routine blood tests, nasal endoscopy and CT scanning of the nose. 1. Cold is the common name for upper respiratory tract infections, most of them are viral infections so, often triggered by cold, can be manifested mainly as nasal congestion, runny nose, cough, phlegm in the throat and other symptoms. Drink plenty of water and treat the symptoms if they are obvious. 2. Rhinitis can lead to nasal mucosa congestion and swelling, which can lead to nasal congestion and runny nose, nasal reflux to the throat, triggering phlegm symptoms, it is recommended to the hospital otorhinolaryngology further through the nasal endoscopy examination to clarify the condition, the use of mometasone furoate nasal spray and other hormone therapy under the guidance of the doctor. 3. Sinusitis is an infection of the mucous membrane of the sinuses, manifested by nasal congestion, pus flow, headache, backflow of nasal discharge to the throat and other symptoms, need to go to the ENT department of the hospital to improve the CT or nasal endoscopy to clarify the condition. Hormone therapy such as budesonide nasal spray, combined with eucalyptus-pinol enteric capsule to promote the drainage of pus from the sinus mucosa, or nasal and sinus rinsing can be used with the treatment. If the symptoms of nasal congestion with phlegm, need to be otorhinolaryngology consultation, to clarify the cause of the disease, and comply with the medical advice of the treatment.