For me it looks like very intial stage of exfoliation as he is just 18 . he says its chronic .
Anyways with good moisturizer you would require a cream which treats fissues, inflamation and bacteria and to which cream you respond totally depends on how your body takes it.
All i know is yes its curable if treated properly
It also speaks about medicines which my doctor just prescribed.
This aritcle also says
Medication with anti-depressants was helpful in the case of a 16-year-old male with persistent crusting of the lips with the diagnosis of exfoliative cheilitis
which we discussed
Mine is self induced which happ due to lip biting and some tobacco stuff or oral fillings. could be any one.
I also see there are so many kind of chilities so one should first get diagnosed to start required treatment
THE ARTICLE ALSO SAYS FOLLOWING THINGS :
When self-inflicted injuries are associated, they are commonly termed "factitious cheilitis". The diagnoses implicate the distinction between other diseases that also affect lips and are generally termed cheilitis. This includes angular cheilitis, plasma cell cheilitis, actinic cheilitis cheilitis glandularis, cheilitis granulomatosa, exfoliative cheilitis and factitious cheilitis .