Its been a long time since I've worked at UPS but it was hell on the hangnails. I handled so many heavy cardboard boxes that it wore my fingerprints off. (They have since grown back, don't worry) The constant contact with the paper , according to that web site, was stealing the oils from my hand and the first part to suffer was the part that separates into the hangnail because it loses its water and dries up. I would get nasty hangnails all the time working there. Sometimes they would bleed. My cuticles were a mess too, but I think that was more from corners and stuff.
Do I sound metrosexual yet?
Huck