Dry, cracked lips? It could be sunburn, yeast infection, vitamin deficiencies or something else – here’s how to fix them

• The lips are particularly prone to dryness because the skin is very thin there, they are constantly exposed to the elements and they don’t have any sweat glands
• We asked two experts how to fix causes including dehydration, sunburn, yeast infection and vitamin deficiencies, and when to go to a doctor