How To: Make fake blood appear on your body without a wound

For some reason, showing a forearm with blood running out of it from a fresh cut is one of the most visceral and popular types of bleeding to depict on screen. This video will teach you how to make blood appear on the arm, or any other part of the body, without creating a wound for the blood to "emerge" from. You will need to do some basic chemistry, but the end result is morbid and fascinating.