Chapped lips are typically caused by environmental exposures that lead to irritation, including saliva and licking your lips, spicy foods, and cold, dry weather, says Dr. Zeichner. The common cold and sun damage can also cause chapped lips, he adds, as well as medication like cholesterol-lowering agents.
Chapped lips are a common symptom of deficiencies, especially in folate (vitamin B9), riboflavin (vitamin B2), and vitamins B6 and B12 ( 11 , 12 , 13 , 14 ).
Dr. Banić