Why do lips crack?

Since lips do not have sebaceous glands (glands that
produce the oily substance)they are prone to drying and cracking, when they are exposed
to extreme weather conditions (cold, excessive heat or strong
wind).

Preventive Methods

- If
lips are exposed to wind, there have to be used ointments and lip
balms;

- If lips are exposed to strong Sun, there have to
be used creams with filtering effect;

- During winter, when
it's very hot in a room, it's important to get some moisture in the air (especially at
night);

- If lips are cracked avoid lips moistening
using the tongue, because saliva does nothing but aggravate the
situation.