The cause and specific mechanism of atrophic pharyngitis is not clear, may be predicted with atrophic rhinitis, external stimuli, environmental factors, endocrine and immune system diseases, malnutrition and other factors. 1. Atrophic rhinitis: atrophic rhinitis nasal mucosal secretion fluid content is reduced, the performance of nasal congestion, followed by open-mouth breathing, resulting in dry pharyngeal crust, pharyngeal mucosa, glandular atrophy, can cause atrophic pharyngolaryngitis. 2. External stimuli: excessive use of voice, eating too hot food, long-term smoking, etc., can cause pharyngeal mucosal epithelial and glandular damage, thus inducing atrophic pharyngolaryngitis. 3. Environmental factors: too cold weather can cause pharyngeal vasoconstriction, too dry weather can affect the pharyngeal mucus secretion and cilia peristalsis, so environmental factors can also induce atrophic pharyngitis. 4. Endocrine and immune system diseases: it will lead to the decline of secretion function of the glands of mucous membranes and skin of the whole body, and there will be dry skin, dry eyes, dry nasal cavity, dry mouth and other manifestations, which will cause atrophic pharyngolaryngitis. 5. Malnutrition: when certain nutrition is insufficient, it will lead to decreased secretion function of mucous membrane and glands, causing atrophic pharyngitis. Atrophic pharyngitis has many causes, should go to the hospital in a timely manner to improve the examination, follow the doctor’s instructions to take standardized treatment, do not ignore the symptoms, take it lightly.