The affected skin turns red and may blister.

受感染的皮肤会变红，并可能起水疱。

《柯林斯英汉双解大词典》

His skin was beginning to blister.

他的皮肤开始起疱。

《牛津词典》

The fertilized female worm(s) (which measures from 60–100 cm long) migrates under the skin tissues until it reaches the lower limbs, forming a blister or swelling from which it eventually emerges.

受精后的雌虫（有60-100厘米长）在皮肤组织以下游走，一直游到下肢，形成一个水疱或者造成肿胀，虫子最终会钻出来。

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These are very deep lesions that go not just on the surface of your skin like a blister would, but down into the dermis or deeper layers of the skins, as well.

这些伤非常深,它们不仅像水泡那样存在于皮肤表面,还深入到真皮层或者皮下更深的地方

耶鲁公开课 - 生物医学工程探索课程节选

The simple sandals can also shield feet against the beach's hot sand, which might otherwise cause skin to burn and blister on your walk to the water.

CNN: Flip-flops present feet with a painful problem

The lesion on the skin starts out as an itchy pimple, which eventually becomes like a blister.

CNN: "The Secret Life of Germs" author Philip Tierno