One nose and eye cannot be blocked, belongs to unilateral nasal congestion, may be trauma, deviated nasal septum, inferior turbinate hypertrophy, nasal polyps, nasopharyngeal carcinoma, unilateral sinusitis and other reasons. 1. Trauma: When the nose is involved in trauma such as violent impact, extrusion, etc., resulting in unilateral nasal bleeding, nasal bone fracture, etc., blood clots, broken bones, etc., clogging the unilateral nasal cavity, this symptom occurs. 2. Deviated nasal septum: the congenital development of the nasal septum is not balanced, and the articulation between the bones is abnormal, which leads to the deformation of the nasal septum, and the narrowing of the nasal cavity is caused by the deviation to one side of the nasal cavity, and this symptom will appear. 3. Hypertrophy of inferior turbinate: after the mucous membrane of inferior turbinate is stimulated by infection for a long time repeatedly, the fibrous tissue of the mucous membrane and capillaries will proliferate and hypertrophy, and the above symptom will appear when it involves one side of the nasal cavity. 4. Nasal polyps: benign hyperplasia of nasal mucous membrane tissue in unilateral nasal cavity leads to narrowing of nasal cavity, so the symptoms appear. 5. Nasopharyngeal carcinoma: the symptom occurs when a large amount of malignant proliferation of tumor tissues in middle or late stage involves unilateral nasal cavity. 6. Unilateral sinusitis: bacteria, viruses and other pathogens cause local inflammatory reaction after infection of sinus, inflammatory secretion increases to a certain degree and overflows out of the sinus into the nasal cavity, and the inflammatory stimulation causes the swelling of nasal mucous membrane, which leads to the blockage of the nasal cavity and the emergence of this symptom. Unilateral nasal congestion, may be related to a variety of factors, it is recommended to consult a doctor to clarify the diagnosis.