If they're too small, it could lead to black toenails, blisters, or numbness.

如果鞋子太小，就会导致黑指甲，水泡，或者局部麻痹。

youdao

Some runners are getting blisters and swelling and performing surgery on shoes seems to fix it.

有些选手脚上起了泡，脚肿起来了，所以在鞋上动一下手术似乎是个解决问题的办法。

youdao

Instead, they think our prints might help wick water off our fingertips or allow our skin to stretch more easily, which can protect it from damage and help prevent blisters.

他们反倒认为指纹有可能是能防止指尖的水分流失，或使得我们皮肤更易吸收水分，从而保护皮肤防止起水泡。

youdao

But if the pain lasts long after the shingles rash and blisters have disappeared, it's called postherpetic neuralgia.

CNN: Postherpetic neuralgia