Acute wounds begin with an injury to the skin that causes bleeding, triggers clot formation, and results in the wound healing cascade. Acute wounds occur because of sudden injury or trauma and usually cause a superficial skin injury or partial-thickness wound that heals as expected according to the normal healing process via primary or secondary intention. Examples of acute wounds include lacerations, abrasions, contusions, hematomas, skin tears, and burns. Wounds that occur as a direct result of surgery are also considered acute wounds and, in some instances, may have delayed closure, as in the case of dehisced surgical abdominal wounds.