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How Pre-Existing Conditions Affect Your California Injury Claim: The “Eggshell Plaintiff” Rule

Here is a worry that stops many injured people from pursuing a fair claim: “I already had a bad back (or a prior injury) – won’t the insurance company just blame that?” It is a common tactic, but California law includes a powerful protection for exactly this situation, and it is important to understand.

Here is how pre-existing conditions really affect an injury claim – and the rule that protects you.

The “Eggshell Plaintiff” Rule, Explained

California follows a long-standing principle often called the “eggshell plaintiff” (or “eggshell skull”) rule. In plain terms: a wrongdoer takes their victim as they find them. If someone’s negligence injures you, they are responsible for the full extent of the harm they caused – even if you were more fragile than average, and even if a healthier person might have been hurt less. Being more vulnerable to injury does not reduce what you are owed.

Aggravation of a Pre-Existing Condition

This matters most when an accident worsens a condition you already had. If a crash aggravates a prior back injury, arthritis, or another condition, you are entitled to compensation for that worsening – the difference between how you were before and after. The at-fault party cannot escape responsibility simply because you were not in perfect health to begin with.

A medical professional in a white lab coat sits at a desk in a dimly lit room, using a computer mouse to examine detailed spinal MRI scans displayed on a large monitor. Multiple screens and medical equipment are visible on the desk.A professional woman in a dark blazer points at a section of an open document or binder while discussing it with an older man in a light blue shirt. They are sitting at a wooden desk in an office with soft, natural lighting.

Why Insurers Raise Pre-Existing Conditions

Knowing the law, insurers still routinely point to pre-existing conditions to argue your injuries “were already there” and to offer you less. Do not take that at face value. The key is clear medical evidence – records that show your condition before the accident and how it changed afterward – which distinguishes the new harm the accident caused from what came before.

Protecting Your Claim

If you have a pre-existing condition, be honest and thorough about it – hiding it only hands the insurer ammunition. Instead, make sure your medical records tell the full story, and get experienced guidance. Properly presented, a pre-existing condition is not a barrier to a fair recovery; the law is on your side.

A prior injury does not mean you deserve less after a new one. If an accident has worsened a pre-existing condition in California, Ellin Mardirosian Law offers a free consultation to help you pursue the full compensation you are owed.

Helpful Resources & Links

🔗 Practice Areas – Ellin Mardirosian Law

🔗 Related: The Hidden Costs of Serious Injuries

🔗 Website by Inspirovate Creatives

🔗 California Courts – Self-Help Center

🔗 Cornell Law (LII) – Eggshell Skull Rule

Free consultation with Ellin Mardirosian Law – call (747) 310-5200. Representing accident and injury victims across California and Nevada. Fluent in English, Spanish, and Armenian.

Disclaimer: This article is general information about California (and, where noted, Nevada) law, not legal advice, and does not create an attorney-client relationship. Every case is different — for guidance on your situation, speak with a licensed attorney.

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