A Head Hit in a Car Crash Can Cause a Brain Injury You Cannot See

A head hit does not always mean a brain injury. Some impacts cause no lasting harm. Others injure the brain even when the head shows no sign of damage. Many people ask whether a head hit car crash brain injury always follows. It does not. This guide explains how crashes injure the brain, which injuries are common, and which symptoms need medical attention.

Why a Head Hit Does Not Always Mean a Brain Injury

A head hit does not automatically mean the brain was hurt. The brain floats in fluid inside the skull. That fluid and the bone around it cushion the brain from everyday bumps.

What matters most is the force, direction and speed of the crash. Whether the head struck a surface matters less. A person can strike nothing and still suffer a brain injury, because the brain can move hard inside the skull.

A serious brain injury can also happen with no cut, bruise or swelling on the scalp. A calm-looking head tells a reader little about what happened inside it. Watching for symptoms matters more than checking for marks.

The Brain Injury Association of America reports that vehicle crashes can cause moderate to severe traumatic brain injuries, along with other bodily injuries. For more, see the firm’s traumatic brain injury page.

How a Crash Can Injure the Brain Without a Direct Blow

A crash can injure the brain even when the head never hits anything. Sudden motion alone can cause harm.

Acceleration and deceleration describe how quickly the head speeds up or slows down. In a crash, the body may stop fast while the head keeps moving. The brain can then strike the inside of the skull.

Doctors describe two patterns. A coup injury happens on the side of the brain that strikes the skull at the point of impact. A contrecoup injury happens when the brain rebounds and hits the opposite side of the skull. Both can occur in the same crash.

Rotational forces add another risk. When the head twists suddenly, the brain can shift at different speeds inside the skull. That twisting can stretch and tear nerve fibers.

Common Brain Injuries Linked to Car and Truck Crashes

The most common crash-related brain injuries include concussion, bruising, bleeding and diffuse axonal injury. Each one affects the brain differently.

A concussion is a temporary disruption of brain function. It can follow a blow or a sudden movement of the head. A concussion can happen without loss of consciousness, so a person who stays awake may still be hurt.

A contusion is bruising of brain tissue. A hematoma is a collection of blood, and a hemorrhage is bleeding inside or around the brain. Bleeding can press on brain tissue and cause serious harm.

Diffuse axonal injury is widespread tearing of nerve fibers. It often results from high-speed rotational forces. Readers who want more detail can see the firm’s supporting page on diffuse axonal injury in high-speed crashes.

Imaging does not always show every type of injury. Symptoms and a medical exam guide the need for further evaluation.

Symptoms That Can Appear Hours or Days Later

Brain injury symptoms can start hours or days after a crash. A person may feel shaken but fine at the scene, then notice problems later.

Physical signs include headache, dizziness, nausea, vision changes, and sensitivity to light or sound. Unusual fatigue can also appear.

Cognitive signs include confusion, trouble remembering things, trouble focusing, and slower thinking. A person may lose track of conversations or struggle with tasks they handled easily before the crash.

Symptoms can come and go. A person may feel better one day and worse the next. That pattern can make the injury easy to miss.

Many people blame these signs on stress or muscle soreness. That explanation is easy to accept, but it can delay evaluation. A medical provider can help sort out the cause.

Emotional and Behavioral Changes After a Head Injury

Mood and behavior changes can be a sign of a brain injury after a crash. Family members often notice these changes before the injured person does.

Watch for irritability, anxiety, sleep problems, or a clear personality shift. A usually patient person may snap quickly. A social person may pull away.

Emotional distress can also follow a crash with no brain injury at all. Fear of driving, nightmares and worry are common reactions to a frightening event. A medical evaluation can help separate the causes.

Tell the medical provider about any change in mood or behavior since the crash. Specific details help more than general statements. The firm’s supporting page on when to see a doctor after head trauma in a crash covers this in more depth.

When a Headache After Hitting Your Head Needs Medical Attention

A headache after a head impact is common, but some signs need emergency care right away. Knowing those signs can help a reader act in time.

Warning signs include:

• A headache that keeps getting worse
• Repeated vomiting
• Confusion or drowsiness that is hard to wake from
• Slurred speech
• Weakness or numbness
• Seizures
• One pupil larger than the other

A person who hit their head and lost consciousness should seek emergency care right away, even if the loss was brief. A person who shows any of these signs should do the same. Someone can feel well at the scene and still have a serious head injury.

What to Do After a Crash If You Hit Your Head

Get a medical evaluation after any head impact, even when symptoms seem mild. Keep a written log of symptoms, dates and changes. Note what you felt, when it started and how it shifted over time.

Virginia requires a driver involved in a crash with injury or death to stop and report it to police immediately (Va. Code §§ 46.2-371, 46.2-894).

The medical record is a written account of symptoms and findings from the start. It can matter later, so describe even small things you notice.

Virginia generally allows two years from the date of injury to file a personal injury lawsuit (Va. Code § 8.01-243(A)); the clock runs from the date of injury, not the date of discovery, with narrow exceptions. Some claims carry notice requirements that run out sooner. The two-year period is the deadline to file a lawsuit, not to report a crash (Va. Code § 8.01-243).

Brain Injuries That Result in a Death

Some crash-related brain injuries are fatal. Families in those situations face urgent questions about the law and the time limits that apply. The firm, based in Winchester, Virginia, represents families across the Shenandoah Valley and in Richmond and Henrico County.

A Virginia wrongful death action is filed by the decedent’s personal representative within two years of the death (Va. Code §§ 8.01-50(C), 8.01-244(B)), on behalf of the family members the statute protects.

Va. Code § 8.01-53 sets out which relatives may be beneficiaries and how the classes are ordered. The firm’s supporting page on who can bring a claim after a fatal crash covers these questions in more depth.

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