Investigators measure skid marks and document vehicle positions at a residential intersection after a pedestrian was struck.

Brain Injury | West Virginia

Personality Changes After a Car Accident Brain Injury in WV

Irritability, mood swings and shifts in behavior can follow a serious crash. Big Bubba Injury Law helps injured West Virginians and their families understand what happened and what comes next.

Published October 23, 2026

Yes. A brain injury from a car crash can change a person’s personality, and those changes often appear days, weeks or months after the crash. If you notice a loved one’s temper, mood or behavior shifting, tell a doctor and start a dated written record. This guide explains what these changes can look like and how a daily journal helps.

Families across West Virginia face this situation. Many first notice the change at home, long after the hospital visits have ended.

What Personality Changes After a Brain Injury Can Look Like

Personality change means a person seems different from their usual self. The change may show up in temper, patience, emotional control, motivation or how they act around others.

Families often describe irritability and quick anger. They also describe emotional swings, sudden crying, or a flat, withdrawn mood. Some describe less interest in friends, hobbies or family events. Others describe impulsive choices, such as spending money without thinking, or speech that comes out harsh.

These changes can appear alongside memory problems, trouble focusing or headaches. They can also appear when the person looks physically well. A brain injury can affect how a person manages emotions even after the body seems to have healed.

The Administration for Community Living explains that automobile accidents can cause traumatic brain injuries. These involve severe brain damage from an outside force. Report any personality change to a doctor, no matter how serious the crash seemed.

If your loved one's temper or mood has changed since the crash, we can talk through what to track and what your family's options are in a free case review. Talk it through with Big Bubba — the first case review is free, confidential, and carries no obligation.

Two damaged vans sit parked on a grassy area in Toyokawa, Japan.

Why Changes Can Show Up Weeks or Months After the Crash

Personality changes often appear weeks or months later because daily demands grow over time. In the hospital, care focuses on urgent medical needs. After discharge, the person returns to home, work, school, driving and family routines.

Those demands can reveal changes that were hard to see during a short visit. A stretch of feeling better can also hide problems. Improvement in physical symptoms does not always mean emotional control has returned.

Changes may build gradually. Irritability that started small can become frequent. Family members who see the person most often usually notice the pattern first. Do not dismiss a change because it appeared later than the crash.

Warning Signs That Need Prompt Medical Attention

Some signs need medical care right away, not at the next scheduled visit. Call 911 or go to the nearest emergency room for new or worsening confusion, a headache that keeps getting worse, or repeated vomiting. Get emergency care for a seizure, unusual drowsiness, or pupils of unequal size. Seek care right away for new weakness or numbness, or for any talk of self-harm.

Sudden, severe or escalating personality changes also need prompt attention. This includes aggression or threats toward others.

The Brain Trauma Foundation’s prehospital TBI guidelines describe how traumatic brain injuries occur and what consequences they can have. They also recommend how these injuries should be assessed and managed early.

Tell the treating doctor about any change, even if you are unsure it relates to the crash. The doctor decides what it means. You do not need to be certain first.

How to Start a Daily Symptom Journal

Start a daily symptom journal by writing one dated entry each day. A single office visit captures only a few minutes. A daily log gives doctors a record of how the person is doing between visits.

Choose a notebook, a printed form or a phone notes file. Keep it in the same place every day so it is easy to find. Write each entry close to the time you notice something, and include the date and time.

Describe what was said or done. Specific details help more than general labels. Writing “irritable” tells a doctor less than writing what set off the outburst and how it ended.

What to Record Each Day

Each day, record mood and temper, behavior, physical and sleep notes, medications, appointments and daily functioning. Keep each part short and factual.

  • Mood and temper: outbursts, crying, what seemed to set them off, and how long they lasted.
  • Behavior and judgment: impulsive spending, unsafe choices, trouble following conversations, or changes in how they treat family.
  • Physical and sleep notes: headaches, dizziness, fatigue, hours slept and appetite.
  • Medications: the name, dose, time taken and any side effects noticed.
  • Appointments: what the doctor said about changes.
  • Daily functioning: work or school, driving, household tasks and social activity.

Here is an example entry: “March 3, 7:30 a.m. Did not want to get out of bed. Snapped at his wife when she asked about breakfast. Slept five hours. Took morning medicine at 8.”

How the Journal Helps Doctors and Future Care Planning

A dated journal helps doctors spot patterns and decide on next steps. Those steps can include referrals to neurologists, neuropsychologists or counselors. A pattern might show that outbursts follow poor sleep or noisy days.

The journal also helps the family describe changes accurately at appointments. Memory can blur details over weeks. A written record keeps the timeline clear.

Mood and behavior changes can affect supervision, work and daily support needs over time. The West Virginia Bureau for Medical Services describes home-based support available through the Traumatic Brain Injury Waiver. The page also explains the medical and financial eligibility requirements. Ask the care team whether your loved one might qualify.

Not sure what your next step is?

Talk it through with Big Bubba — the first case review is free, confidential, and carries no obligation.

Firefighters in protective gear and boots inspect a crashed car at an accident scene.

How the Record Supports a Claim and Your Next Step

A consistent daily record, paired with medical records, can help show how a crash changed a person’s mood, behavior and daily life. The journal captures what the family observed. It adds to medical testing and a doctor’s opinion rather than replacing them.

Timing matters. Under W. Va. Code § 55-2-12, a personal injury action generally must be brought within two years after the right to sue accrued. West Virginia law also requires a personal injury action to be brought within two years after the right to bring it has accrued, under W. Va. Code § 55-2-12.

Many families face a hard decision: whether to pursue a claim after a loved one’s personality has changed. Gather the journal, medical records and any crash details you have before you decide.

For more on these injuries, see our page on traumatic brain injury in car accidents in West Virginia. We serve Charleston injury victims and families across the state.

Frequently asked questions

Can a brain injury from a car accident change someone’s personality?

Yes. A brain injury can change how a person handles temper, mood and behavior, and those changes can appear after the crash.

How long do you have to file a personal injury lawsuit in West Virginia?

Under W. Va. Code § 55-2-12, a personal injury action generally must be brought within two years after the right to sue accrued.

If your loved one’s temper or mood has changed since the crash, bring your journal and medical papers to a free case review with the firm. The review is confidential and carries no obligation to continue.

Big Bubba Injury Law is a trade name of Correll Legal Corporation, 142 N Queen St, Suite 121, Martinsburg, WV 25401, which is responsible for the content of this page. The information on this page is general information, not legal advice. Reading it or contacting the firm does not create an attorney-client relationship. No attorney fee unless we win; clients remain responsible for case costs.

Related practice areas

Get a Free Case Review