Ghosts. I'm constantly seeing things out of the corner of my eye and it freaks me out.
Anything having to do with eyeballs. Even something as small as getting something in an eyeball.
Anything gross getting in your mouth. There was a movie called Cabin Fever where there's a rotting, diseased body in the water and someone gets the water in their mouth. I literally threw up until I threw up blood.
Any rotting flesh. I won't go in a body of water because I'm afraid of all the dead, rotting things.
When I first saw this, I thought, oh nothing, I'm tough.
Apparently I am not.