...and the end days for those unfortunate people can be rough.
I don't know anything about the very curious bruising.
Circulatory or infection maybe.
I had a blood draw, on Tuesday and, as usual, I have a good sized hematoma in the crook of my right arm so I get that happens. But from the photos I've seen of his hands, in particular, it look like he's got a case of untreatable frost bite!
If so, don't do that again. Keep your arm straight for a few minutes after the draw and apply direct pressure to the site, to help prevent an antecubital hematoma.
This has happened, before. When I was in the Navy I had been put on a diuretic medication that caused me to lose far too much weight (about 25 lbs, and I only weight about 130, to begin with). I was having blood drawn every week or two so they could check on my potassium levels. One time I got a corpsman who was very nervous around women and he blew the draws in BOTH arms. Despite my weight loss, I have VERY good veins for blood draws, which always surprised any of the corpsmen I dealt with. I honestly felt bad for the guy.
I've heard that there can be strange effects ...