What Is a Mild Traumatic Brain Injury?

A mild traumatic brain injury (mTBI) is a brain injury caused by a blow, bump, or jolt to the head, or by a force that makes the head and brain move quickly back and forth. The word “mild” can be misleading. It describes how the injury is classified at first, not how much it can affect someone’s life.

Our Denver brain injury attorneys know that some people recover from a mild concussion within days or weeks. Others deal with headaches, memory problems, or mood changes for months or longer. Those symptoms can affect work, relationships, and finances. They can also affect the value of an injury claim.

Let’s cover the basics of mild TBIs, what symptoms to watch for, what determines settlement value, and how our law firm can help you with recovery. If you need to discuss your situation with trial-tested brain injury attorneys, contact Ogborn Mihm today.

Key Takeaways

• Mild traumatic brain injuries often cause at least one of the following symptoms: loss of consciousness; loss of memory immediately before or after head trauma; feeling confused, dazed, or experiencing other changes in mental state; localized changes in muscle control, speech, language, and coordination.
• You do not need to hit your head to suffer a mild brain injury. Sudden force or blows to the body can cause the brain to move and lead to an injury.
• Symptoms of a mild TBI may include headache, dizziness, double vision, mental fog, trouble concentrating, irritability, and mood swings. Be sure to see a doctor after experiencing any notable head trauma.
• “Mild” TBIs can still cause long-term issues with physical, cognitive, and mental health.

Understanding Mild Traumatic Brain Injury (mTBI) and Concussions

A mild TBI is a disruption in normal brain function caused by a sudden jolt, blow, or rotational movement of the head. Under the widely used definition from the American Congress of Rehabilitation Medicine (ACRM), a mild TBI is generally identified when the injury causes at least one of the following:

• Any loss of consciousness
• Loss of memory for events immediately before or after the incident
• Any change in mental state at the time of the incident, such as feeling dazed, disoriented, or confused
• Focal neurological deficits, which may or may not be temporary

To be classified as mild, the injury generally must not involve loss of consciousness longer than about 30 minutes or memory loss lasting more than 24 hours.

What Is the Difference Between a Concussion and a Mild Traumatic Brain Injury?

In practice, the terms are often used interchangeably.

A concussion is a type of mild traumatic brain injury, and both describe the same general set of symptoms and diagnostic criteria.

From a legal standpoint, a concussion claim involves many of the same issues as a more serious TBI case: proving the injury, connecting it to the accident, and documenting how it has affected your life.

How You Should Interpret the Word “Mild”

“Mild” refers to the initial severity of the injury as measured by these clinical criteria, not the seriousness of its long-term effects.

A mild TBI can happen in a car crash, bicycle or pedestrian accident, fall, sports collision, workplace incident, or any event involving sudden force to the head or body.

Can You Suffer a Mild TBI without Hitting Your Head?

Yes.

A mild TBI can result from rapid movement of the head and neck, such as the whiplash motion in a car crash, even without a direct blow to the head. The sudden force can cause the brain to move inside the skull and injure brain tissue.

Recognizing Physical, Cognitive, and Emotional Symptoms of a Mild TBI

Mild TBI symptoms may appear right away or develop over the following hours, days, or weeks, and they vary from person to person. Recognizing them early matters for both recovery and any future legal claim.

Physical symptoms of a mild TBI can include:

• Headaches
• Dizziness or balance problems
• Nausea or vomiting
• Sensitivity to light or noise
• Fatigue or drowsiness
• Blurred or double vision
• Feeling dazed or stunned

Cognitive symptoms of a mild TBI can include:

• Mental fog or slowed thinking
• Trouble concentrating or remembering
• Confusion
• Difficulty finding the right words
• Slower responses or repeating questions

Emotional and sleep-related symptoms  of a mild TBI can include:

• Irritability or mood swings
• Anxiety
• Depression or persistent sadness
• Trouble falling asleep
• Sleeping much more or less than usual

These symptoms can overlap with stress, fatigue, or other conditions, so they are often overlooked or blamed on something else. That’s part of what makes a mild TBI so hard to recognize and document.

Anyone who has taken a hit to the head should be checked by a doctor, even if they feel fine. 

When to Get Emergency Care

Get emergency care for the following red flag warning signs:

• Headache that gets worse and does not go away
• Repeated vomiting
• Slurred speech
• Weakness or numbness
• Seizures
• Unusual drowsiness or inability to wake up
• One pupil larger than the other
• Increasing confusion
• Extended loss of consciousness

Do All Mild TBI Symptoms Show Up Right Away?

No. Some symptoms appear immediately, while others, such as mood changes, memory problems, or sleep disturbances, may not become noticeable for days or even weeks.

This delay is one reason mild TBIs are sometimes missed or misdiagnosed at first.

Why Mild Brain Injuries Can Still Lead to Serious, Long-Term Impairments

Despite the name, a mild TBI isn’t always minor. Many people recover within a few weeks, but a significant number continue to have symptoms for months or even years. These persistent post-concussive symptoms can affect memory, concentration, mood, and the ability to work long after the injury seems to have healed.

The National Institute of Neurological Disorders and Stroke explains how even a mild TBI can affect thinking, behavior, and emotions, and why some people need ongoing treatment and rehabilitation.

What Should I Do If My Concussion Symptoms Persist for Months or Years?

If symptoms haven’t improved after a few weeks, keep following up with your doctor and ask about a referral to a specialist, such as a neurologist, neuropsychologist, or concussion clinic.

The Concussion Legacy Foundation also offers resources for people living with persistent post-concussion symptoms. Keep a record of your ongoing symptoms and how they affect your daily life, since that information supports both your treatment and any legal claim.

Average Mild Brain Injury Settlement Values in Denver and Colorado

There’s no average settlement for brain injuries in Colorado. Value depends on how long symptoms last, how well they’re documented, and how much the injury affects the person’s ability to work and function.

Still, a few general patterns tend to apply regarding how much a brain injury claim is worth:

• Mild TBI cases where symptoms resolve within weeks and the medical records are clear often settle for amounts that mainly reflect medical costs and short-term lost income.
• Cases involving persistent post-concussive symptoms that last months or longer tend to settle for significantly more because they include ongoing treatment, lost earning capacity, and the toll on daily life.
• When fault is contested or the insurer disputes the diagnosis, mild TBI compensation claims in Colorado often take longer to resolve and may need stronger medical testimony to reach a fair value.

Colorado law also caps non-economic damages, such as pain and suffering, in most cases. For civil actions filed on or after January 1, 2025, the general cap is $1.5 million.

Is It Worth Talking to a Lawyer If My mTBI Symptoms Seem to Be Improving?

It can be, especially if someone else’s negligence caused the injury.

An attorney can help you understand whether a settlement offer reflects the full cost of your recovery, including the risk that symptoms could return or last longer than expected. 

An attorney can also make sure you don’t miss a filing deadline. In Colorado, this is generally two years for most injury claims, three years for brain injuries caused by motor vehicle crashes.

Key Evidence Needed to Prove an Invisible Injury in Court

Because a mild TBI often doesn’t show up on a standard CT scan, proving the severity of the brain injury takes a different kind of evidence than a broken bone does. Strong mild TBI claims typically include:

• Prompt Medical Evaluation: Getting checked soon after the incident, even if symptoms seem minor, creates an early record linking the injury to the event.
• Consistent Follow-Up Care: Ongoing treatment notes help demonstrate that symptoms are real, persistent, and actively being treated.
• Neuropsychological Testing: These evaluations measure cognitive changes that standard imaging can’t show.
• Advanced Imaging: Techniques such as diffusion tensor imaging (DTI) may provide additional evidence in some cases.
• Witness Accounts: Family, friends, and coworkers who have noticed changes in memory, mood, or behavior can back up the medical record.
• A Symptom Journal: Writing down daily symptoms, especially in the first weeks, helps track patterns and severity over time.

If you’re wondering whether a concussion alone can support a claim, a lawyer can review the facts with you and explain whether you can sue for a concussion in Colorado.

How Insurance Companies Undervalue Concussion and mTBI Claims

Insurers know that mild TBIs are harder to prove than injuries that show up clearly on imaging, and some adjusters use that uncertainty to minimize claims. Common tactics include:

• Pointing to normal CT or MRI results as proof that the injury isn’t serious, even though many mild TBIs don’t appear on standard imaging
• Arguing that symptoms are exaggerated or unrelated to the incident
• Treating a gap in medical care as evidence that the injury wasn’t significant
• Blaming symptoms on a prior condition, stress, or age
• Offering a quick, low settlement before the full extent of the symptoms is known

Recovery from a mild TBI isn’t always a straight line, so settling too early can mean accepting far less than the claim is worth. Thorough documentation and, when needed, legal representation help make sure the claim reflects the injury’s real effects.

Talk to a Brain Injury Lawyer at Ogborn Mihm

A mild TBI or concussion can affect your health, work, and daily life long after the accident. If your symptoms have continued, or you’re dealing with medical bills, lost income, or other losses, it’s important to understand how those issues affect a potential claim.

Ogborn Mihm has handled significant brain injury cases. We’re trial ready, and ready to hear from you. For a free consultation, contact our law firm today.