In humans, the skin is the most visible organ, and it is also the most frequently damaged organ when children sustain injuries. The injuries most commonly seen are bruises and abrasions. These injuries are usually the result of everyday activities at home, including play, sports, or during participating in traffic. In most cases, a skin injury is the only abnormality. However, sometimes an external injury is an indication for more serious internal damage (the tip of the iceberg phenomenon).