Well that was dark. I loved it!
These short stories worked really well. They weren't too short that I was left wanting more, and they weren't too long either. My favorite of the bunch was the first one, "This Skin Was Once Mine". 

"Seedling" had elements of science fiction and body horror. Definitely shocked by the ending.
"All The Parts of You That Won't Burn Easily" takes second place for my favorite. It gave me the heebie-jeebies and I loved the twist. 
"Prickle".... DAMN. That ending was rough. 

Each story had a different narrator and I liked them all. They each fit their respective stories well.