cre as . ▁Other ▁sympt oms ▁of ▁de h yd r ation ▁includes ▁head ache , ▁th irst ▁and ▁dry ▁mouth , ▁d izz iness , ▁tired ness , ▁and ▁dark ▁colored ▁ur ine . ▁ ▁In ▁severe ▁cases ▁of ▁de h yd r ation ▁in ▁di abet ics , ▁low ▁blood ▁pressure , ▁sun ken ▁eyes , ▁a ▁weak ▁pul se ▁or ▁rapid ▁heart ▁beat , ▁feeling ▁confused ▁or ▁fat igue . ▁De h yd r ation ▁and ▁high ▁blood ▁gl uc ose ▁for ▁extended ▁period ▁of ▁time , ▁the ▁di ab etic ' s ▁kid ney ▁would ▁try ▁to ▁filter ▁the ▁blood ▁of ▁access ▁gl uc ose ▁and ▁ex crete ▁this ▁as ▁ur ine . ▁As ▁the ▁kid ne ys ▁are ▁filtering ▁the ▁blood , ▁water ▁is ▁being ▁removed ▁from ▁the ▁blood ▁and ▁would ▁need ▁to ▁be ▁replaced . ▁ ▁This ▁leads ▁to ▁an ▁increased ▁th irst ▁when ▁the ▁blood ▁gl uc ose ▁is ▁elev ated ▁in ▁a ▁di ab etic ▁individual . ▁Water ▁is ▁needed ▁to ▁re - h yd rate ▁the ▁body . ▁Therefore , ▁the ▁body ▁would ▁take ▁available ▁from ▁other ▁parts ▁of ▁the ▁body , ▁such ▁as ▁sal iva , ▁tears , ▁and ▁from ▁cells ▁of ▁the ▁body . ▁If ▁access ▁water ▁is ▁not ▁available , ▁the ▁body ▁would ▁not ▁be ▁able ▁to ▁pass ▁excess ▁gl uc ose ▁out ▁of ▁the ▁blood ▁by ▁ur ine ▁and ▁can ▁lead ▁to ▁further ▁de h yd r ation . ▁ ▁Se vere ▁sympt oms ▁of ▁N DM ▁( Def ic