Nasal congestion in winter may be caused by cold and dry weather, which leads to congestion of nasal mucosa, or the patient himself has acute and chronic nasal disorders, such as chronic hypertrophic rhinitis, allergic rhinitis, etc. In winter, the patient may suffer from congestion of nasal mucosa. 1. Nasal mucous membrane congestion: due to the cold and dry climate in winter, the patient’s nasal cavity is stimulated by the cold air and dry environment, it is easy to appear nasal mucous membrane congestion, thus causing nasal congestion. 2. Chronic hypertrophic rhinitis: patients enter the winter, the living environment of the temperature and humidity of the drastic changes in the temperature drop, air humidity is low, the nasal mucosa long-term stimulation by climate change caused by tissue congestion and edema, hyperplasia and thickening or polypoid lesions due to the occurrence of hypertrophic nasal turbinates patients may appear persistent nasal congestion, runny nose, headache, smell weakening and other symptoms. 3. Allergic rhinitis: allergic rhinitis is a chronic reactive inflammation of the nasal mucosa, winter temperatures drop, the air is dry, a large amount of dust suspended in the air, flakes and other substances, the patient may cause allergic rhinitis after inhalation, resulting in the emergence of the present nasal itching, paroxysmal continuous sneezing, runny nose and nasal congestion and other symptoms. It is recommended that the patient should consult a doctor in time for examination and treatment after clarifying the cause of the disease, pay attention to keep warm in life, keep the room clean, quiet and suitable temperature and humidity, pay attention to monitoring the condition and regular review.