A closed wound is an injury to the skin or other soft tissue that is not open to the environment. It is often referred to as a sealed wound. Examples of closed wounds include contusions, lacerations, abrasions, and puncture wounds.
Contusions, also known as bruises, occur when an object strikes or squeezes the skin. The force of the impact breaks the small blood vessels in the skin, causing bleeding under the skin and discoloration. Contusions can range from small and barely visible to large and very painful.
Lacerations are cuts or tears in the skin. Lacerations can be caused by sharp objects, such as knives or glass, or by blunt force, such as a punch or kick. The laceration's size and depth depend on the impact's force.
Abrasions occur when the skin is scraped or rubbed against a rough surface. Abrasions can range from minor scrapes to deep scrapes that may require stitches.
Puncture wounds are caused by a sharp object, such as a nail or needle, that pierces the skin. Puncture wounds can be deep and may require medical attention.
Closed wounds typically do not require stitches, but they may require medical attention if they are large or deep. In some cases, a doctor may need to clean the wound and apply an antibiotic ointment or dressing. In addition, if the wound is not healing properly, a doctor may need to prescribe antibiotics or other medications to help the healing process.