The memory of all that blood was enough to 'make my flesh crawl/creep'. [=to make me feel disgusted, afraid, etc.]
I try to get up early and exercise, though sometimes 'the spirit is willing but the flesh is weak'.
pleasures of the 'flesh' [=physical pleasures, such as eating, drinking, and having sex]
(..) Let's see what we've got here. Barnes. JOHN: The devil's hands have been busy. What is it? It's real flesh and blood, though it seems to heal itself quickly. The heart is human and very powerful. The brain, too, but with a chip interface. (..)2009 Terminator Salvation