Meth squitoes

The small flying insects (similar to traditional mosquitoes ) derived from heavy use of methamphetamine. While tweaking on a meth binge the insatiable urge to scratch (being unsatisfiable) leaves scabs and or sores.

Dude, did you see that tweaker that's been hanging around the library? Ya bro, looks like he got attacked by a swarm of meth squitoes.