The most commonly damaged internal organs in abdominal injuries are usually the liver, spleen, and bilateral kidneys. In the case of contusions to the right upper abdomen, the most commonly damaged internal organs are mainly the liver, which can lead to contusion or rupture of the liver and bleeding. In the case of contusions to the left upper or middle abdomen, the spleen will most commonly rupture and bleed. In the case of bilateral lumbar contusions or falls, crush injuries, etc., bilateral renal rupture and bleeding may occur most commonly, and the general symptoms are localized bruising or pressure pain in the epidermis of the injured area. If the kidney is injured, hematuria may also be seen, in addition to systemic symptoms such as pallor, cold sweat, painful facial expression, and hemorrhagic shock or even coma if the amount of bleeding is high.