It's a vitamin B2 deficiency 
Not a chapstick deficiency 
As a matter of fact, you may want to avoid lip balm because the ingredients usually contain alcohol or mineral oil that pulls oil from your skin so you keep needing more.
Any idea why they would want to do that? If you guessed SO YOU’LL KEEP BUYING MORE - you were right 
What’s behind chapped lips?
A B2 (riboflavin) deficiency. It’s a coenzyme that helps breakdown fats to make sure your skin is lubricated.
The good news is B2 is in 
Eggs
Leafy greens
Nuts
Dairy
Meat
Fish
You can become deficient if
-You take birth control
-Eat a vegan diet
-Eat refined grains and sugars
There could also be a lack of Omega-3’s (not consuming it) or you are consuming too many Omega-6 oils (seed oils like vegetable oil, corn, soybean, etc).
Did you know this? 
#chappedlips #crackedlips #b2