Unfortunately, this is reality for people with an extremely rare allergy to water called aquagenic urticaria.

不幸是，对于源麻疹这种极为罕过敏症患者来说，这是现实。

If you have a condition called solar urticaria, big, itchy welts develop within minutes of sun exposure.

如果您患有日麻疹，露在阳下几分钟内就会出现又大又痒伤痕。

In solar urticaria, that same process seems to happen, but the molecule that’s causing the immune system freakout is a mystery.

在日麻疹中，似乎会发生同样过程，但导致免疫系统崩溃分子是一个谜。

Instead of showing up almost immediately, like solar urticaria, it can take hours or even days and it sticks around for a while, too.

它不会像日麻疹那样几乎立即出现，而是可能需要数小时甚至数天， 并且还会持续一段时间。