[header] How to identify insect bites [title] Figure out where you were when bitten. [step] Different insects live in different places, and there are certain circumstances where it is more likely to be bitten by each of them. [substeps] If you were outdoors, and perhaps near a wooded area, you were probably bitten by a mosquito, tick, or spider. 
If you were near food or garbage, you may have been bitten by a fly, or stung by a bee or wasp. If you were indoors, sitting somewhere or playing with a pet, it may be fleas.