Sir , my father worked in steel plant and retired now , during the office field operations once his legs got injured due to hot pressure air leaked and the hot air pressure hit his both legs and got burnt .. in that process his right leg thumb was been burnt very deeply taken medications and cured later.. now the problem was he was unable to walk freely from few days his nerves got weak in leg  ..if he stand for sometime he getting vertigo type feeling getting very weak and felling down  .. pls advice futhur ...for which specialist we have to approach...