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A violent accident can cause significant physical and mental harm to an individual. Two of the most common causes of traumatic brain injuries in the U.S., according to the Centers for Disease Control and Prevention, are falls and motor vehicle accidents, both of which can be caused by other people’s carelessness or negligence.

But what’s the difference between a concussion and a TBI? A TBI is an injury that impairs normal brain function, and a concussion is a relatively milder form of traumatic brain injury. A concussion can still impact or disrupt the normal function of the brain, just not to the same extent as a more severe TBI.

What Is a Concussion and Its Symptoms?

A concussion is a relatively mild traumatic brain injury that often results from a jolt or violent impact to the head. However, the symptoms of a concussion are not always apparent and may take hours or days to manifest. Some of the classic signs of a concussion vs. a TBI include:

  • Loss of consciousness
  • Headache
  • Nausea
  • Vomiting
  • Fatigue
  • Changes in hearing or vision
  • Dizziness
  • Confusion

Signs of concussion that may appear after the initial incident can also include sensitivity to lights or sounds, irritability, problems concentrating, and forgetfulness. In children, signs of a concussion can also include lethargy, excessive crying, and irritability.

Key Differences Between Concussions and Other TBIs

Medical practitioners often categorize traumatic brain injuries as one of three levels: mild, moderate, or severe. Mild TBIs, such as concussions, are serious but not life-threatening. In many cases, medical observation, rest, and over-the-counter pain medication are all that is needed to manage the symptoms of a concussion. However, having one concussion puts a patient at risk of post-concussion syndrome or a more severe TBI if a second injury occurs.

Moderate and severe traumatic brain injuries tend to cause significant physical and mental impairment, which, in some cases, may be permanent. However, at onset, the difference between a TBI and a concussion may be hard to distinguish.

When to Seek Medical Attention for a Head Injury

Seek medical attention for a suspected head injury immediately. All head injuries must be evaluated by a medical professional who can properly diagnose and treat a TBI.

There is no way to tell just by looking at a person how severe their head injury is. In the aftermath of an accident, the adrenaline in a person’s system can mask some of the most obvious signs of an injury. Swelling and bleeding in the brain are not apparent to the naked eye but can be life-threatening. Even relatively mild TBIs like concussions can turn serious without proper medical treatment and intervention.

Contact The Terry Law Firm for Help with Your Brain Injury Case

If you have been diagnosed with a concussion or other traumatic brain injury following an accident someone else caused, get help with your brain injury case from the legal team at The Terry Law Firm. Our personal injury attorneys stand ready to evaluate your situation and help you seek the maximum compensation you deserve for your medical expenses and other losses.

Contact our office today and request a free initial consultation to learn more.

Trial attorney F. Braxton “Brack” Terry focuses his law practice on representing injured people in a wide range of personal injury claims, including cases involving truck crashes, car accidents, defective products, premises liability, and more. His efforts have secured significant verdicts and settlements, including over $20 million for a large group of plaintiffs, and recoveries of $5.3 million, $4.1 million, $3.6 million, $3.1 million, $2.49 million, and high-six-figure amounts for individuals.

Brack has received numerous professional honors from prestigious organizations. Most recently, he was named “Lawyer of the Year” by Best Lawyers® for Personal Injury Litigation in Knoxville in 2026. He has been listed in Best Lawyers® every year since 2013 and by Super Lawyers since 2009. Brack has been a member of the Multi-Million Dollar Advocates Forum since 2007.

Brack earned his law degree from the Nashville School of Law in 1996. In addition to membership in the Tennessee Bar, he is admitted to practice before the U.S. District Court for the Eastern District of Tennessee and the U.S. Court of Appeals for the 6th Circuit. Brack is a member of many professional organizations, such as the Tennessee Trial Lawyers Association, the American Association for Justice, and the Interstate Truck Litigation Group.

Admitted to Tennessee Bar: 1996
Years of Legal Experience: 30
Listed in The Best Lawyers in America®: 2013-Present
Listed as a Mid-South Super Lawyer: 2009-Present