There are many causes of nasal congestion, such as colds, allergic rhinitis, nasal polyps, etc., which need to be relieved by conservative treatment or surgery according to the specific causes. 1. Colds: Colds can cause inflammation, congestion and swelling of the mucous membrane of the nasal cavity, resulting in poor ventilation and symptoms of nasal congestion. In this case, you can apply hot compresses, or take oral cold medication, such as cold clear capsule, aminocrystalline capsule, cold spirit granules and so on. 2. Allergic rhinitis: itchy nose, large amount of clear mucus, paroxysmal sneezing, nasal congestion as the main performance. In this case, allergens should be avoided, and if the nasal congestion is serious, medications such as furosemide nasal drops and budesonide nasal spray can be used to effectively relieve the symptoms of nasal congestion. 3. Nasal polyps: generally manifested as persistent nasal congestion. Conservative treatment can use drugs, such as mometasone furoate nasal spray, fluticasone propionate nasal spray. If the effect of conservative treatment is not obvious, it is necessary to consider surgical treatment, such as sinus endoscopic nasal polypectomy. There may be other causes of nasal congestion, such as hypertrophic rhinitis, enlarged turbinates, and nasal foreign bodies. If nasal congestion persists, it is recommended to consult a doctor to identify the cause and then targeted treatment. Some of the above drugs are prescription drugs and should be used under the supervision of a doctor or pharmacist.