If you are left wondering what causes constant dry cracked lips, then it is highly likely that this is the common condition known as angular cheilitis.
The condition is easily diagnosed by looking at the corners of the mouth and is characterised by tiny horizontal cracks, similar to paper cuts.
These tiny splits are extremely painful and can swell around the edges which take on a whiteish hue.
Angular Cheilitis can be very persistent and if left untreated, can develop into a severe fungal infection which is even harder to shift.
Very often sufferers start with outbreaks which do not last for too long but in time, each outbreak becomes more severe until it becomes an almost permanent condition.
Constant dry cracked lips are caused by a bacterial infection.
Bacteria thrives in damp, warm conditions and the edges of the mouth often have tiny folds and creases which can trap moisture, providing a breeding ground for bacteria and fungal infection.
This is more likely if the sufferer has a tendency to drool or dribble, which is often the case for denture or brace wearers (particularly if the fitting is poor) and for pen or finger suckers.
Of course, if dentures or braces do not fit well, then get them adjusted as soon as possible.
Similarly, if pen or finger sucking is an issue, then many people find that painting on a little anti-nail biting solution can be a very effective deterrent.
The best way to deal with the constant dry cracked lips is to dry up the area which is affected by saliva.
This starves the bacteria or fungus of oxygen, without which neither can survive.