The shade of red you used works well with the greys and blues here and the soft texture of the background is a very nice touch, but as I've said before to someone else here I think blood tends to be far overused in art posted online and it does very quickly lose its effect. I think compositionally too it'd look better if the only red was in the eyes since the red of the corner is pulling my attention too far from the main subject area here. You have a great "in the moment" effect going on. It really looks like a snapshot of time as some unseen event was really happening.