Dunno. It just makes my skin crawl. Maybe cause it reflects like illness or some kind of rash or disease I just don’t want to see.
Honestly there’s nothing actually scary about it though. Just a sense of unwellness. Like when you watch a scary movie and you get hit with a Jumpscare.
When you look back at it rationally, it is like that wasn’t scary but when you got first hit by it you felt scared.