In vitamin A deficiency, the nasal mucosa epithelium undergoes degenerative changes and glandular secretion is reduced, which can lead to nasal dryness. In vitamin B deficiency, it can lead to impaired epithelial cell metabolism and weakened mucosal resistance, inducing nasal dryness.
In addition to the associated vitamin deficiency, it can also be caused by diseases such as atrophic rhinitis, nasal scleritis and dry rhinitis, and a hospital visit is recommended for examination to clarify the diagnosis.