A pre-existing condition does not stop you from seeking compensation after a car accident. However, it can make your claim more complicated. Insurers and courts will always use your medical history to argue that your injuries existed before the crash. Knowing how the law handles this situation and what evidence you need puts you in a better position to win.
1. Application of the “Eggshell Plaintiff” Doctrine
Courts and insurance companies mostly adhere to the “eggshell plaintiff” principle when dealing with crash cases involving pre-existing conditions. The doctrine states that a person who causes harm to another cannot use the victim’s physical vulnerability as a defense.
That means the party at fault must take responsibility for all the damages caused by the accident. That is especially true even when the victim’s pre-existing medical condition made injuries far worse than they would have been for a healthier person.
Insurance adjusters already know this rule exists. Their strategy is not to deny it but to argue the accident had nothing to do with your current symptoms. They will dig through your medical history and request further examinations to establish that your pain is old and not new. The eggshell doctrine pushes back on the argument by keeping the focus on whether the crash made things worse, not on how healthy you were before it happened.
2. The Requirement to Prove Aggravated Injuries
The eggshell doctrine protects your right to full compensation, but it does not eliminate your burden of proof. You still need solid evidence to show how the accident made your condition measurably worse. In this case, you need to show that you had a medically documented condition before the crash, and your symptoms or treatment needs got worse after it.
You must also prove that the accident is what caused that change. Stating your condition increased after a crash is not enough. You need to provide detailed medical records, diagnostic test results, and expert testimony to show a clear link between the collision and the worsening of your health. Reduced mobility and the emergence of new symptoms can also be crucial in proving the accident’s impact.
This is where proper legal help matters. A Tucson car accident lawyer who handles aggravated injury claims knows how to build that connection through the right medical evidence and expert opinions. They will also counter the insurance company’s attempts to shift blame onto your history. Their accurate and consistent comparison between your pre-accident and post-accident health is the foundation of your case.
3. Compensation May Depend on Separating Old and New Damages
Even with the above factors working in your favor, insurers and courts still try to separate what the accident caused from what was already there. This distinction directly affects how much you recover. For instance, you are not entitled to compensation for pain you were already living with before the crash. However, you can be paid for every way the accident made that pain worse. That difference needs to be clearly defined in your records and supported by medical opinion.
Your doctor plays a key role in separating the two damages. A doctor who treated you before and after the accident can tell what changed and why. That clarity will prevent the insurance companies from using your old condition to reduce your payout. You should disclose any prior condition when seeking post-accident treatment. Providing a clear record of conditions and their treatments helps insurers and juries to assess the legitimacy of your claim.
Endnote
A pre-existing condition raises the bar for what you need to prove rather than ending your claim. The eggshell doctrine puts the law in your favour, while medical evidence and the right to legal support let you use it. If someone else’s negligence made your condition worse, you still have every right to seek full compensation for that harm.
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