What often causes incisions?

Incisions are typically defined as clean, straight cuts that penetrate the skin and can occur due to sharp objects. When someone comes into contact with items such as glass or metal, these objects can slice through the skin with a clear edge, resulting in an incision. The precision of these cuts often leads to less tissue damage compared to other types of wounds, making them distinct in both appearance and healing considerations.

In contrast, other options present different types of injuries. Elbows and collisions might cause bruises or contusions rather than incisions, while falling onto surfaces could lead to abrasions or lacerations, which have more ragged edges versus the clean lines of an incision. Using dull tools tends to create tearing or less defined wounds, not the precise cuts characteristic of incisions. Thus, the primary cause of incisions is indeed sharp objects capable of producing clean, surgical-like cuts.