urbed , ▁there ▁may ▁be ▁an ▁over g row th ▁and ▁in fection , ▁such ▁as ▁when ▁ant ib iot ics ▁kill ▁micro bes , ▁resulting ▁in ▁an ▁over g row th ▁of ▁ye ast . ▁The ▁skin ▁is ▁continuous ▁with ▁the ▁inner ▁ep ith el ial ▁l ining ▁of ▁the ▁body ▁at ▁the ▁or ific es , ▁each ▁of ▁which ▁supports ▁its ▁own ▁complement ▁of ▁micro bes . ▁ ▁Cos met ics ▁should ▁be ▁used ▁carefully ▁on ▁the ▁skin ▁because ▁these ▁may ▁cause ▁all erg ic ▁re actions . ▁Each ▁season ▁requires ▁suitable ▁cl othing ▁in ▁order ▁to ▁facil itate ▁the ▁ev ap oration ▁of ▁the ▁swe at . ▁Sun light , ▁water ▁and ▁air ▁play ▁an ▁important ▁role ▁in ▁keeping ▁the ▁skin ▁health y . ▁ ▁O ily ▁skin ▁O ily ▁skin ▁is ▁caused ▁by ▁over - active ▁se b ace ous ▁g lands , ▁that ▁produce ▁a ▁subst ance ▁called ▁se bum , ▁a ▁naturally ▁health y ▁skin ▁lub ric ant . ▁A ▁high ▁g ly cem ic - index ▁di et ▁and ▁da iry ▁products ▁( except ▁for ▁che ese ) ▁consumption ▁increase ▁I G F - 1 ▁generation ▁which ▁in ▁turn ▁increases ▁se bum ▁production . ▁Over w ash ing ▁the ▁skin ▁does ▁not ▁cause ▁se bum ▁over production ▁but ▁may ▁cause ▁dry ness . ▁ ▁When ▁the ▁skin ▁produces ▁excess ive ▁se bum , ▁it ▁becomes ▁heavy ▁and ▁thick ▁in ▁texture . ▁O ily ▁skin ▁is ▁typ ified ▁by ▁sh in iness , ▁b lem ishes ▁and