Nose a little blocked, breathlessness, may be related to nasal masses, nasal septum deviation, rhinitis or sinusitis and other reasons. 1. Nasal swelling: benign tumors such as nasal polyps, fibro-angiomas, and malignant tumors such as nasopharyngeal carcinoma can lead to narrowing of the nasal cavity, resulting in blocked nose and breathlessness. 2. Deviated nasal septum: previous trauma, developmental abnormalities and other factors lead to deformity of the bone and cartilage structure of the nasal septum, resulting in narrowing of the nasal airway, which may affect ventilation. 3. Rhinitis or sinusitis: due to the stimulating effect of inflammatory factors, can cause nasal mucosa congestion, edema, can lead to narrowing of the respiratory tract, appearing breathlessness. It is recommended that the nose is a little blocked, breathless people go to the hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor for standardized treatment.