Final answer:
Never apply a tourniquet around the neck or the trunk of the body, as it is meant for limb injuries to control severe bleeding and can cause harm if used incorrectly.
Step-by-step explanation:
You should never apply a tourniquet around the neck or a wound on the trunk of the body. A tourniquet is typically used to control severe bleeding from a limb and is placed as close to the injury as possible while being at least a couple of inches above the wound, but not over a joint. Using a tourniquet on the neck can cause serious harm because it can obstruct the airway or vital blood vessels.