The common causes of a stuffy nose, also known as nasal congestion, include colds, nasal polyps, sinusitis, and so on. 1. Cold: usually refers to the common cold, mainly caused by viral infection of the upper respiratory tract. It can lead to sneezing, nasal congestion, nasal discharge and coughing, and some patients may also have fever, chills, headache and fatigue. 2. Nasal polyps: a common chronic disease of the patient’s nasal cavity and sinus mucosa, mainly considered as a perverse reaction, heredity, nasal cilia dysfunction and so on. Smaller nasal polyps usually have no obvious symptoms, while larger nasal polyps can lead to nasal congestion and loss of smell and other symptoms. 3. Sinusitis: It is an inflammatory disease of the sinus mucosa caused by bacterial, fungal and viral infections, which can lead to nasal congestion, runny nose, head and face pain and loss of smell and other symptoms. In addition, acute rhinitis, allergic rhinitis, intranasal foreign body, nasal tuberculosis and so on can lead to the nose, so you need to go to the hospital in time to identify.