▁being ▁less ▁pat ent ▁than ▁the ▁other . ▁ ▁Sign s ▁and ▁sympt oms ▁ ▁C aus es ▁ ▁This ▁might ▁have ▁occurred ▁due ▁to ▁bar ot ra uma ▁of ▁descent , ▁and / or ▁the ▁effects ▁of ▁nas al ▁de con gest ants . ▁It ▁is ▁due ▁to ▁une qual ▁increase ▁in ▁middle ▁ear ▁press ures ▁on ▁as cent , ▁is ▁usually ▁m ild , ▁and ▁most ▁often ▁cleared ▁by ▁further ▁as cent . ▁When ▁the ▁press ures ▁in ▁both ▁ears ▁reach ▁ambient ▁levels , ▁the ▁stim ulus ▁for ▁the ▁d izz iness ▁stops . ▁Although ▁most ▁often ▁m ild , ▁the ▁vert igo ▁can ▁persist ▁until ▁the ▁diver ▁reaches ▁the ▁surface ▁continu ing ▁the ▁une qual ▁press ures , ▁which ▁can ▁damage ▁the ▁inner ▁ear ▁or ▁ear ▁drum . ▁ ▁Altern obar ic ▁vert igo ▁is ▁most ▁pron ounced ▁when ▁the ▁diver ▁is ▁in ▁the ▁vertical ▁position ; ▁the ▁spin ning ▁is ▁towards ▁the ▁ear ▁with ▁the ▁higher ▁pressure ▁and ▁tends ▁to ▁develop ▁when ▁the ▁press ures ▁differ ▁by ▁ 6 0   cm ▁of ▁water ▁or ▁more . ▁Ear ▁clear ing ▁may ▁be ▁a ▁rem edy . ▁A ▁similar ▁vert igo ▁can ▁also ▁occur ▁as ▁a ▁result ▁of ▁une qual ▁he ating ▁stim ulation ▁of ▁one ▁inner ▁ear ▁lab yr inth ▁over ▁the ▁other ▁due ▁to ▁div ing ▁in ▁a ▁pr one ▁position ▁in ▁cold ▁water ▁- ▁the ▁und erm ost ▁ear ▁being ▁stim ulated . ▁ ▁Di agn osis ▁In ▁terms ▁of ▁diagn osis ▁for ▁altern obar ic ▁vert