How Concussions After a Crash Often Go Undiagnosed

A concussion can occur even if you never hit your head — and its symptoms often don’t appear until hours or even days later.

At The Hoffmann Law Firm, L.L.C., we’ve seen countless Missouri car accident victims who delayed medical care because they thought they were fine — only to learn later that they had a traumatic brain injury (TBI) that could have been diagnosed much sooner.

If you suspect you suffered a concussion after a car accident in Missouri, don’t wait to get checked out — and don’t deal with insurance adjusters alone.

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What Is a Concussion?

A concussion is a type of mild traumatic brain injury caused by a blow or jolt to the head or body that causes the brain to move rapidly inside the skull.
During a crash, your brain can “bounce” or twist, damaging brain cells and disrupting normal function — even in low-speed or rear-end collisions.

  • You do not have to lose consciousness or have visible trauma to the head to suffer a concussion.

Common Symptoms of a Concussion After a Car Accident

Concussion symptoms can be subtle and vary from person to person. Watch for the following warning signs in the hours and days following your accident:

  • Headache or pressure in the head
  • Dizziness or balance problems
  • Nausea or vomiting
  • Blurred vision or light sensitivity
  • Trouble concentrating or remembering things
  • Feeling “foggy,” slowed down, or confused
  • Mood changes, anxiety, or irritability
  • Fatigue or difficulty sleeping

If you experience any of these symptoms, see a doctor immediately. Early diagnosis can make a major difference in recovery — and in the strength of your injury claim.

Why Concussions Often Go Undiagnosed

There are several reasons concussion injuries are overlooked after Missouri car accidents:

  1. Delayed Onset: Symptoms can take hours or days to appear.
  2. No Visible Injury: Victims often assume no visible head wound means no brain injury.
  3. Adrenaline Masking Pain: After a crash, shock and stress can hide early symptoms.
  4. Insurance Pressure: Adjusters may encourage quick settlements before you realize how serious your injury is.

That’s why documenting every symptom and getting medical care immediately is essential — not just for your health, but to protect your right to full compensation.

Missouri Law and Concussion Injury Claims

Missouri is an at-fault state, meaning the driver who caused your crash can be held responsible for your damages — including medical bills, lost wages, and pain and suffering.

However, if a concussion goes undiagnosed and untreated, insurance companies may try to argue that your symptoms are unrelated to the crash.
Working with a St. Louis car accident attorney can help ensure your injuries are properly documented and your rights are protected.


Why Work With The Hoffmann Law Firm

For over 25 years, Attorney Christopher Hoffmann has represented St. Louis residents injured in auto accidents — including clients suffering from undiagnosed or delayed-onset brain injuries.

We understand the medical, emotional, and financial toll a concussion can take. Our firm will handle every step of your claim while you focus on recovery.

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Updated: October 24, 2025