I've got an insect bite.

我被虫子咬了一口。

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The insect bite made her finger swell.

蚊虫的叮咬让她的手指肿胀起来。

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I've got some sort of insect bite on my leg.

我腿上被小虫咬了一口。

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Children are commonly infected through a cut, scrape or insect bite, but they can also develop impetigo without having any notable damage to the skin.

CNN: Impetigo

It begins as a raised itchy bump that resembles an insect bite, but soon turns into a painless ulcer, usually one to three centimeters in diameter usually with a black center in the middle.

CNN: Ten things you need to know about anthrax

The cause of Chagas disease is the parasite Trypanosoma cruzi, which is transmitted to humans from a bite from an insect known as the triatomine bug.

CNN: Chagas disease