Nasal congestion is usually caused by allergic rhinitis, sinusitis, nasal polyps and so on. Depending on the different conditions, corresponding treatments can be taken, such as taking medication, using nasal sprays, washing the nose with nasal washers or surgery. 1. Allergic rhinitis: it is a nasal allergic reaction disease caused by contact with allergens, the main symptoms are nasal congestion, itchy nose, sneezing and so on. Antihistamines and glucocorticoid nasal sprays, such as loratadine, mometasone furoate nasal spray and budesonide nasal spray, can be applied. 2. Sinusitis: it may be the inflammatory stimulation that leads to swelling of the nasal mucosa, large amounts of pus and nasal mucus accumulation, turbinate hypertrophy and so on, resulting in nasal congestion. Patients can use nasal wash, with saline cleaning nasal cavity, nasal congestion symptoms may be relieved. 3. Nasal polyps: Nasal polyps are getting bigger and bigger with the development of nasal polyps, once they block the space of nasal cavity and occupy the space, nasal congestion of different degrees will occur. Nasal polyps can be treated by nasal polypectomy to improve the symptoms of nasal congestion. Nasal congestion caused by a number of conditions, patients should go to the hospital in a timely manner, under the diagnosis of the doctor to determine the condition, the cause, to take targeted medication and treatment, not their own indiscriminate use of drugs in order to avoid aggravation of the condition.