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]
(..) I had my book, it was almost good. And I saw a chicken. How random is that? What? What? You saw a chicken? Like, a real live chicken in the flesh? Well, it was covered in feathers, but... What's going on? You need to talk to Red. - About what? - You just need to talk to her. (..)2013 TvShow: Orange Is the New Black Title: The Chickening Season: 1 Episode 5