Nasal congestion in the morning may be caused by cold, vasomotor rhinitis and allergic rhinitis. 1. Cold: it may be due to cold caused by cold, nasal congestion in the morning is due to the response of the nasal mucosa to the stimulation of cold air, cold air stimulation of the nasal mucosa will lead to congestion of the nasal mucosa, hypertrophy of the nasal turbinates, thus causing nasal congestion. 2. Vasomotor rhinitis: it can appear under mental tension, anxiety, endocrine dysfunction and other conditions. The excitation of parasympathetic nerves leads to the release of histamine, resulting in congestion of the nasal mucosa, glandular secretion and other phenomena, thus causing nasal congestion, watery nasal discharge and so on, and most of these symptoms are aggravated in the morning. 3. Allergic rhinitis: the body’s sensitivity to external allergic stimuli increases after rising in the morning, mucosal edema, secretion increases, resulting in nasal congestion and runny nose in the morning. Patients should actively go to the hospital after the morning nasal congestion, clear diagnosis and standardized treatment.