text: where do worms/maggots come from when something rots? if you leave some food on the table for some time and it rots, you'll find maggots on them... where do they come from? do they just appear or did they craw there? how?...   i've seen bottles with maggots inside (because whatever it contained had gone bad)... so... how did it happen?! you shouldn't be getting any worms.... maggots are fly larvae - meaning that flies have laid eggs in your food (you've seen flies attracted to rotting food, i'm sure). the eggs hatch and the larvae slowly grow until they form a pupa and transform into an adult fly.