What are the causes of chapped lips?

Factors Contributing to Chapped Lips

Chapped lips can be caused by several factors, including: sunburn, exposure to cold weather, hot or dry conditions, and the habit of frequently licking your lips. Additionally, certain medical issues such as allergies, thyroid disorders, and some autoimmune diseases can contribute to this problem. Reactions to specific medications may also play a role. Furthermore, a deficiency in vitamins like iron and vitamin B, as well as dehydration, can lead to chapped lips.