Sore throat and stuffy nose may be caused by upper respiratory tract infection, atrophic rhinitis, acute bronchitis and other reasons. 1. Upper respiratory tract infection: airborne viruses enter the respiratory mucosa through droplet transmission, causing acute inflammatory reaction of the nasal mucosa, pharyngeal mucosa and other parts of the acute inflammatory reaction, capillary permeability increases, a large number of inflammatory substances exudate, nasal cavity, pharyngeal edema, congestion, so it will be a sore throat and stuffy nose. 2. Atrophic rhinitis: the nasal cavity is blocked by pus crusts, the air can not pass, or because the nasal mucosa atrophy, nerve sensory retardation, although there is air through, but can not be detected due to. Atrophic lesions involving the pharynx occurs in the throat dry discomfort, hoarseness and irritating dry cough or a slight pain. 3. Acute bronchitis: viruses, bacteria and other pathogenic microorganisms infect the bronchial tubes, inducing acute inflammatory reaction of the bronchial mucosa, a large number of inflammatory substances secreted to cause coughing reaction, inflammation will involve the nasal cavity, throat and other parts of the nose and throat caused by nasal congestion, sore throat and other symptoms. Sore throat and stuffy nose may be related to a variety of factors, it is recommended to consult a doctor for a clear diagnosis.