This is an inherited type of lip skin.it needs constant care and attention.Don't purse or bite ur lips.Avoid smoking,it'll increase flaking of ur lips.Cut down on alcohol.Flavoured coloured lip balms can aggravate ur situation.menthol containing products vil increase the agitation.silver coated sweets shud not be taken.apply lip moisturiser twice daily,u can also use ghee,malai or Vaseline.protect ur lips with sunscreen half an hour before stepping out.severe cases,vil also need medications.