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You walk away from a car accident knowing something’s wrong. Your back—the same back that’s given you trouble for years—feels different now. Worse. The dull ache you’ve learned to manage has become sharp, constant pain.
Then comes the worry: will the insurance company use your pre-existing condition against you?
The short answer is they’ll try. But having a prior injury doesn’t automatically disqualify you from recovering compensation. Below, our friends at Warner & Fitzmartin – Personal Injury Lawyers discuss what actually happens when an accident aggravates an existing condition.
Understanding Pre-Existing Conditions
A pre-existing condition is any injury, illness, or health issue that affected you before the accident occurred. Common examples include previous back or neck injuries, old knee or shoulder problems, degenerative disc disease, arthritis, prior surgical sites, and chronic conditions like fibromyalgia.
You might’ve been managing your condition just fine before the crash. Maybe it caused occasional discomfort but didn’t stop you from working, exercising, or handling daily activities. The accident changed that.
Aggravation Vs. Exacerbation: Why The Difference Matters
The legal system distinguishes between two types of injury worsening. Aggravation refers to permanent worsening of an existing condition due to an accident, while exacerbation describes a temporary worsening that eventually returns to its baseline.
Here’s the thing: that distinction directly affects your compensation. If the accident permanently made your condition worse—say, turning manageable back pain into something requiring surgery—that’s aggravation. If the crash caused a temporary flare-up that subsided after treatment, that’s exacerbation.
Both are compensable, but aggravation claims typically involve higher settlements because the harm is permanent.
What You Can Actually Recover
While you cannot recover compensation for a pre-existing condition itself, you are entitled to compensation for the aggravation, increase in severity of pain, or new treatment needed for the existing condition.
Let’s say you had a herniated disc that occasionally caused minor back pain. You managed it with over-the-counter medication and avoided heavy lifting. After the accident, that same disc now causes debilitating pain requiring surgery.
You can’t claim damages for the original disc problem. But you can recover compensation for the worsened pain and limitations, additional medical treatment and surgery, new medications or therapy, lost wages due to increased disability, and pain and suffering from the aggravation.
The truth is, you’re entitled to be compensated for the difference between your condition before and after the accident.
The Eggshell Skull Rule
There’s a legal doctrine that protects people with pre-existing vulnerabilities. The eggshell skull rule states that in a tort case, the unexpected frailty of the injured person is not a valid defense to the seriousness of any injury caused to them.
The principle requires that a defendant must “take the victim as they find them”. In other words, if someone rear-ends you at a stoplight, they’re responsible for all the harm they cause—even if your pre-existing condition made you more susceptible to injury than the average person.
The at-fault driver can’t argue, “Well, a healthy person wouldn’t have been hurt this badly.” They hit you. They’re liable for the consequences.
How Insurance Companies Will Fight Back
Insurance adjusters know most people don’t understand their rights when pre-existing conditions are involved. They’ll use that confusion to reduce or deny your claim.
They’ll blame everything on your pre-existing condition, arguing that your current pain has nothing to do with the accident. They’ll downplay the severity, claiming the accident only caused a minor flare-up. They’ll misinterpret medical records, cherry-picking details from your history to build their narrative. And they’ll offer quick, low settlements before you understand your claim’s true value.
What You Need To Prove
To successfully claim compensation for an aggravated pre-existing condition, you need to demonstrate that the accident made your condition measurably worse.
Medical records are crucial. You need documentation showing the status of your condition before the accident, how the crash changed your symptoms or limitations, new treatments required, and professional medical opinions linking the worsening to the accident.
If you were living an active life before the crash—working full-time, exercising regularly, managing household tasks without difficulty—that baseline matters.
Be Honest About Your Medical History
Here’s something people get wrong: they try to hide their pre-existing conditions, thinking it will help their claim.
It won’t. Insurance companies investigate. They’ll find your medical history. And when they do, your credibility tanks.
Be upfront with your motorcycle accident lawyer about previous injuries or conditions. Let them decide how to handle that information strategically.
The Bottom Line
Having a pre-existing injury doesn’t disqualify you from recovering compensation after an accident. But it does make your claim more complex.
Insurance companies will scrutinize your medical history, looking for ways to minimize their payout. They’ll argue that you can’t separate the accident’s impact from your existing condition.
That’s why proving aggravation requires solid medical evidence, clear documentation, and often professional testimony establishing the connection between the accident and your worsened condition.
If an accident has made a pre-existing condition significantly worse, consulting with a qualified attorney can help you understand how to document the aggravation and pursue fair compensation for the additional harm you’ve suffered.