High-pressure injection injury is a traumatic injury caused by the accidental subcutaneous injection of a substance at high pressure. Previous studies have reported a poor prognosis. A 41-year-old man was injured when hydraulic hose oil was injected into the palm of his right hand. The injury was debrided at 6 hours after the injury. A penrose drain was used for drainage. The injury healed well without any serious functional impairment. The prognosis of this case was influenced by several factors, including the relatively early time that elapsed between injury and surgery, the substance that was injected, the site of injury, and the effectiveness of the drainage method. To shorten the time between injury and surgery, it is important to promote awareness in workplace settings about the risks of high-pressure injection injury and create an environment that encourages early consultation in the event of injury.
