These problems make it extremely difficult for the diver to reach an equilibrium with the different pressure conditions underwater, and in the last case, can result in severe earache, bleeding, and even punctured ear drums. For the rest of us, diving presents an opportunity to exercise and explore.
水底壓力大，心臟病、高血壓患者會承受不住；有中耳炎、鼻竇炎的人無法平衡水壓，會導致耳朵內外疼痛，甚至出血、耳膜破裂，都不適合潛水。對沒有這些病症的人，潛水不僅是項運動，也能拓展視野。