What type of injury is caused by a sharp, pointed object and may lead to significant internal bleeding?

A puncture is an injury caused by a sharp, pointed object piercing the skin and potentially entering deeper tissues, which can result in significant internal bleeding. This type of injury is particularly concerning because the depth and location of the puncture can affect vital organs and blood vessels, leading to serious consequences if not addressed swiftly.

In contrast, abrasions are superficial injuries that involve the scraping away of the skin's outer layer, while contusions are bruises that occur due to blood vessels breaking under the skin, resulting in localized swelling and discoloration. Strains relate to injuries of muscles or tendons due to overstretching or tearing without any penetration of the skin. Therefore, punctures are uniquely associated with the risk of internal bleeding due to the potential for significant trauma beneath the surface of the skin.