The Eggshell Plaintiff Rule
One of the foundational principles in personal injury law is that defendants take their victims as they find them. This is called the "eggshell plaintiff" or "thin skull" doctrine.
If you had a pre-existing back condition and a car accident worsens it significantly, the at-fault driver is liable for the aggravation — not just for what a healthy person might have suffered. The fact that you were more vulnerable to injury doesn't reduce the at-fault party\'s responsibility.
What you cannot recover is compensation for the pre-existing condition itself — only for how the accident made it worse.
What Insurance Companies Do With Prior Injuries
Insurance companies have sophisticated systems for researching claimants' prior injury history:
- ISO ClaimSearch database: Tracks prior insurance claims across carriers. An adjuster can see your prior claims history quickly.
- Medical records requests: Insurers request your complete medical history, often going back years, looking for prior treatment to the same body parts injured in the current accident
- Social media monitoring: Adjusters may monitor social media for evidence inconsistent with claimed injuries
Their strategy is to argue that your injuries predate the accident, or that you would have needed the same treatment regardless.
Protecting Your Claim When You Have Prior Injuries
- Be completely honest with your attorney about your medical history. They need to know everything to protect you. Undisclosed prior injuries that emerge during discovery are far more damaging than disclosed ones.
- Be consistent about your prior condition in medical records. Tell your treating physicians about prior conditions so they can document the baseline before the accident and the change caused by it.
- Establish a before-and-after picture. The goal is to show what your condition was before the accident and how the accident changed it — requiring clear documentation from both periods.
Frequently Asked Questions
Can I file a claim with a pre-existing condition?
Yes. You can recover for aggravation of a pre-existing condition. The eggshell plaintiff rule protects you — defendants take victims as they find them.
Will insurance companies use my prior injuries against me?
Yes. They will search claims databases and medical records looking for prior treatment. Complete honesty with your attorney is essential.
What is the eggshell plaintiff rule?
Defendants are responsible for the full extent of a victim's injuries even if those injuries are unusually severe due to a pre-existing condition.
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InjuryClaimSource is an educational resource. We are not a law firm. How pre-existing conditions affect claims depends on your specific facts and jurisdiction. Consult a qualified personal injury attorney.