The biggest lie insurance adjusters tell injured people?
That a pre-existing condition kills your case. It doesn’t. This myth frightens people from filing wrongful death lawsuits and personal injury claims that they are entitled to file. A pre-existing medical condition can make your case stronger if it is managed properly.
Here’s what most people don’t realise:
- The law literally protects victims with pre-existing conditions
- Insurance companies use this myth to lowball claims
- Aggravation of an old injury is fully compensable
Let’s break this down properly.
What you’ll discover:
- The Pre-Existing Condition Myth Explained
- Why The Eggshell Plaintiff Rule Changes Everything
- How Insurance Companies Use This Against You
- What A Wrongful Death Lawsuit Covers
- Steps To Protect Your Compensation Rights
The Pre-Existing Condition Myth Explained
A pre-existing condition is any illness, injury or health problem that existed before the accident. Think arthritis, old back injuries, diabetes, prior surgeries, depression — anything in your medical history.
And here’s the wild part…
This is very common. The CDC reports that six in ten adults in the US have at least one chronic disease. If pre-existing conditions were grounds for exclusion, most of the country couldn’t be in the legal system.
That’s not how the law works. That’s how insurance companies want you to think it works.
The myth goes something like this:
“You had back pain before, so we don’t owe you anything for the back pain you have now.”
Appears to make sense. But it’s not — legally and factually. The accident didn’t cause the preexisting back pain. It aggravated it. The law provides that the liable party owes for the aggravation.
Why The Eggshell Plaintiff Rule Changes Everything
This is the legal doctrine that destroys the pre-existing condition myth in one swing.
The eggshell plaintiff rule (also referred to as the “thin skull rule”) is that a defendant must take their victim as they find them. Simplified English: If the person who injured you just happened to injure someone with a frail body or pre-existing condition, tough luck for them — not you.
Here’s how it plays out:
Two people are rear-ended in the same crashes. One suffers a stiff neck. The other — with a prior spine injury — needs surgery. The driver at fault is responsible for both.
This rule is true in every state. Whether the case is a slip and fall, truck accident or wrongful death lawsuit, the defendant is not going to give a break because the victim was not a perfect 10. For anyone with a complex injury history, the quickest way to find out what a wrongful death lawsuit or claim is worth is to have a free evaluation with a Houston personal injury attorney who handles cases like this every day.
How Insurance Companies Use This Against You
Insurance adjusters know about the eggshell plaintiff rule. They just hope you don’t.
Their entire strategy is to get you to believe that your preexisting condition is the true cause of your pain. Every penny that they don’t pay out is a penny that they keep.
Common tactics they pull:
- Demanding access to your full medical history (going back years)
- Cherry-picking old doctor visits to “prove” your symptoms aren’t new
- Arguing your condition would have gotten worse anyway
- Offering a quick lowball settlement before you talk to a lawyer
It works on a lot of people. People who are unaware of the eggshell rule settle for a fraction of what their case is worth. Or worse — they don’t file at all.
This is more important now than ever before. A 2025 CDC report showed that nearly 194 million American adults had one or more chronic health conditions in 2023. The majority of accident victims are walking through the door with something the insurance company can use as an excuse.
What A Wrongful Death Lawsuit Covers
When a loved one is killed by negligence, surviving family members file a wrongful death lawsuit. More than anything else, pre-existing conditions derail these cases.
Here’s why:
Insurance companies will say the deceased “would have died anyway” due to an underlying health condition. A heart condition. Cancer in remission. Diabetes. They’ll latch onto anything in the chart and use it as a get-out-of-jail-free card.
Except for one thing. The law doesn’t care about that label. All that matters is: If the accident caused or accelerated the death, the family has a valid wrongful death lawsuit. Period.
A successful wrongful death lawsuit can recover:
- Medical bills before death
- Funeral and burial expenses
- Lost income the deceased would have earned
- Loss of companionship and support
- Pain and suffering before death
The pre-existing condition only comes into play if it was the only cause of death. If the accident contributed in any significant way, then the wrongful death action proceeds.
Steps To Protect Your Compensation Rights
Here’s how to keep insurance companies from using your medical history against you.
Be 100% Honest About Your History
Covering up a pre-existing condition is the worst possible action. The insurance companies will discover it. When they do, your credibility will be destroyed and your case will be sunk.
Tell your attorney about everything — past injuries, past surgeries, mental health issues. A good lawyer will use this information to build up your case, not tear it down.
Get Medical Treatment Immediately
The clock starts ticking when the accident occurs. The more time that passes, the easier it is for insurers to claim your symptoms are not related.
Inform the physician about the pre-existing condition and the new symptoms. Both should go in the medical record.
Document The “Before And After”
Your case lives or dies on showing how your life changed after the accident.
- Old medical records that show your baseline
- New records that show the change
- Imaging studies (X-rays, MRIs) before and after
- Statements from people who knew you before
Don’t Talk To The Other Side’s Insurer
What you tell the at-fault driver’s insurance company, they will use against you. Let your attorney speak.
Hire An Attorney Who Knows This Game
The eggshell plaintiff rule is simple. Using it in court is an art form. You need someone who has litigated these issues and has had success defeating the “pre-existing condition” defense.
Final Thoughts
Pre-existing conditions don’t cancel your right to compensation. They never have.
The law is on your side. The eggshell plaintiff rule is on your side. The medical evidence — if documented properly — is on your side. The only thing standing between you and fair compensation is the insurance company’s bluff.
To quickly recap:
- A pre-existing condition does NOT disqualify your claim
- The eggshell plaintiff rule protects you in every state
- Aggravation of an old injury is fully compensable
- A wrongful death lawsuit moves forward even with prior health issues
- Honesty with your lawyer is non-negotiable
Don’t let an adjuster talk you out of what’s owed.
