This guys arm looks pretty disturbing

What in the actual frick!?

It's called a fistula. That's standard for dialysis.

Holee shite he got a parasite in he arm and it been feeding.

Parasites are a big deal these days. Keep an eye out for em, keep the nails clipped regularly, don't dig in the dirt with your hands, and avoid public restrooms and the subway.

He sees what you're doing.

Movie Board. "The Thing"

That’s his bicep