WTF is this?

My 2 year old has recently in the past 4 months started smelling terribly like so foul. We would brush his teeth and give him a bath 5-7x a day and the smell wouldn’t go away. The doctors said it was fine and it would go away. His nose started giving off a green snot everyday but he never acted sick or bothered, he has an extensive medical history so I scheduled another appointment because I’m like 3 months later this isn’t right. The other day his nose was pouring snot and blood like no other and I was let me get a flash light and investigate....

I did some picking with a q-tip and saw something coming out like a booger.. look what came out... what is this? hair ball? 😳 after we pulled it out he doesn’t smell anymore and there isn’t anymore snot... it’s a miracle but really what is this? 🤢