Why is Deadpool So Ugly?

The Marvel movie Deadpool opens February 12. You might not know all that much about the character if you haven’t been reading comics. He’s not exactly a superhero as we understand the term, although he does have powers.  

Deadpool's basic character arc revolves around the question of whether he will ultimately become a hero or remain an anti-hero mired in senseless violence. From the beginning, he openly longs for redemption but feels he can't earn it because he's done too many bad things in his life, that he's fated to be a "monster." But the number of bad things Deadpool has done generally pale in comparison to the bad things that have been done to him.

Oh, and apparently he doesn't look all that good under his mask. An article at The Daily Dot explains that and the character’s comic book background, to get us all up to speed for the movie.