A contaminated wound is a type of injury where the integrity of the skin is compromised, allowing the entry of foreign materials like dirt, bacteria, and other pathogens. These wounds occur when there is a significant breach in sterile conditions or when the wound is exposed to a non-sterile environment. Contaminated wounds are common in traumatic injuries, surgical procedures that involve the gastrointestinal tract, and wounds that have been exposed to the environment for an extended period.