Creative makeup which is a stereotypical aspect of the horror genre. This shows the lesser a theme of violence but a theme of infection. No use of blood but these effects are just as good. This is a simplistic but effective makeup look.
This is a good approach to scars. I like this image as it is a realistic interpretation as it has the right texture and colour, Also with the products and techniques used it looks like it is a deep scar and has left a depth and change in the skin.