What type of injuries might require a tourniquet?

A tourniquet is specifically designed to address severe bleeding that cannot be controlled by other means. In situations where a person is experiencing life-threatening hemorrhage, especially in a limb where direct pressure or other standard methods are insufficient, a tourniquet can effectively restrict blood flow to the area and prevent further blood loss. This is particularly crucial in cases of traumatic injuries, such as those sustained from accidents or gunshot wounds.

Using a tourniquet on minor cuts and scrapes, or injuries that do not bleed, would be unnecessary and could even cause more harm than good, as these conditions typically do not warrant such an extreme intervention. Additionally, while swelling can occur with fractures, a tourniquet is not recommended for managing fractures alone unless there is also a significant bleeding problem associated with the injury. Thus, the use of a tourniquet is reserved for situations involving uncontrolled and severe bleeding, making that answer the most appropriate choice.