In crossfit we perform high volume movements during WODs. 100 pull ups for time is likely to cause calluses to rip or create hot spots where the first layers of skin peel off. Taking care of your hands is essential in the prevention of those nasty bloody rips.
Back in my competitive days of gymnastics, the cure for the bloody rips was pure iodine solution on the injury, tape, and hit the bars again. Things are not so barbaric these days.
I came across an informative tutorial on how to take care of your hands. It is “Callus Management, Caring for Rips, and Tape Wrap Tutorial” by Fight or Flight Academy. Do what works for you.