What is the black worm that is small in the bathroom and can jump and crawl fast

It may be a midge, not a jump, is flying, midges like to inhabit sewers, fish tank filters, flower pots and other moist places with a putrid smell, most of the species suck human blood, spray with insecticides, scald with boiling water, and often clean up the places with stagnant water in the home.

Flea bar! This little black worm is hard to catch. It's better to buy veterinary medicine and clean it up all at once, it reproduces very quickly!

I don't know what it is, have you found the answer?

It can't be a flea, you kill one to see what it looks like, search for flea pictures on the Internet, and compare them. In veterinary pharmacies, there is a powder for flea killing, and the effect is very good.