Insurance companies and defense lawyers often use this label to make a head injury sound minor: no skull fracture, no visible wound, maybe no dramatic scan finding, so they argue the person should have recovered quickly. That is not what it means. A closed head injury is damage caused by a blow, jolt, or rapid movement of the head when the skull stays intact and nothing penetrates it. It can range from a mild concussion to more serious traumatic brain injury, including bruising, bleeding, swelling, or shearing of brain tissue.

What matters in real life is that a "closed" injury can still cause major problems. Headaches, dizziness, light sensitivity, memory trouble, mood changes, sleep disruption, and slowed thinking may show up hours or days later. That is common after car crashes, falls, ski collisions, or pileups on Oregon highways when dense fog, ice, or stop-and-go traffic causes sudden impact forces.

For an injury claim, the fight is usually over proof. Because there may be no open wound, insurers often question whether symptoms are real or crash-related. Early medical evaluation, brain injury screening, and consistent records help connect the injury to the event and show how it affects work and daily life. In Oregon, the general deadline for most personal injury claims is two years under ORS 12.110, so delayed symptoms should still be documented fast.