What I want to say is that there is a small puddle of blood but find myself using the term too often and want to try something different.
A quick search of the term on books.google does return a few results using that exact phrase but I want to be sure that the term is correct in use.
Best Answer
"Pile of blood" doesn't sound great to my ears. You usually have piles of solid things, like books or leaves. However, some native speakers do say "pile of blood".
If you want a different term, try "pool of blood". This is the most common collocation there is according to my COCA search for
_nn* of blood_nn*, which finds any noun followed by "of", followed by "blood" as a noun. If we include the plural ("pools"), there are 408 hits total.In comparison, "pile(s) of blood" only had 4 hits, half of which were for "pile of blood and [something solid]".