I had some little critters once that would bite something horrid, they would crawl like in waistline of underwear, in socks, in your armpits and bite you over and over and over until you took a shower, then they were gone. It took feeding off nearly every rodent I had to get rid of them. Mainly due to the impossibility of treating them with chemicals that might effect the snakes. Still have no clue what they were but wouldn't wish them upon anyone... they suck!!