A member asked:

What kind of insect bite turns black and blue?

A doctor has provided 1 answer

Spider bites: Sometimes spider bites will look very dark black or blue/purple. There are only 2 types of poisonous spiders in north america- the black widow and brown recluse. They usually cause flu like symptoms and severe pain. Most spiders are not dangerous, but keep the area clean to prevent infection.

Answered 7/26/2018

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