I. Am. So. Excited. For. Halloween. No seriously, I love doing halloween makeup because it's just so much more creative and fun.
If you're a bit stuck what to do, this is a great idea for both the low-budget and last-minute since you only really need to buy liquid latex and fake blood (and even that you can make at home). Oh, I suppose old clothes would be handy too for the purpose of cutting them up and adding blood to make it look like you've been attacked. But let's concentrate on the face for now.
First, you'll want to draw out an outline of where you'll want your scratches to be, mostly to give yourself an idea, because now you're going to cover them up. With tissue and liquid latex. Layered.
Important thing to note!
Don't get liquid latex on your eyebrows, eyelid, or general eye area because this stuff hurts when you peel it off.
When you have enough layers, let that all dry (you can speed up the process with a hairdryer on gentle heat) and then add foundation and powder to blend into your skin. This won't be perfect, but your friends will be too impressed/scared to notice that.
Next, very carefully rip the tissue/latex into lines down your face (feel free to redraw the lines if that helps) and seal the edges down with a bit more liquid latex.
Now fill in those gouges with something red, be it eyeshadow or red lipstick (I used both), and then add depth to the edges with darker colours to make it look more realistic. I would also recommend adding fake blood, but I didn't have any to hand.
For a final touch, lightly dust brown/grey eyeshadow over your face to dirty it up a bit.
For other Halloween inspiration, check out these tutorials from last year, as well as this Zombie Disney look and this Bloody Mary look.