Can You Still Recover Damages if You Had a Pre-Existing Injury?

The ‘Eggshell Plaintiff’ Principle

This well-established legal principle holds that a defendant must “take their victim as they find them,” meaning they are responsible for the full harm caused, even if a plaintiff’s pre-existing vulnerability made the injury worse than it would have been for someone else. The name comes from the idea that an eggshell-thin skull breaks more easily, but the person who caused the impact is still responsible for the full break.

This principle exists because it would be fundamentally unfair to reduce a defendant’s responsibility simply because their victim happened to have a prior vulnerability they had no way of knowing about or controlling.

How Insurers Use Pre-Existing Conditions Against You

A common insurer tactic is to argue that your current pain or limitation stems entirely from a prior condition, not the accident. This is one of the most frequent arguments raised to minimize or deny claims, particularly for injuries to the back, neck, and joints, where prior wear and degeneration are common.

This argument is often overstated. Insurers sometimes point to any prior medical record mentioning a similar body part, even an old, fully resolved issue, and treat it as if it fully explains your current, active symptoms.

The Difference Between Aggravation and an Unrelated Condition

The key legal question is often whether the accident aggravated or worsened a pre-existing condition, which is generally compensable, versus whether your current symptoms are entirely unrelated to the accident, which would not be. This distinction is central to how these cases actually get resolved.

Aggravation claims are common and legitimate: someone with a prior back issue that was manageable, or even asymptomatic, before an accident, but became significantly worse afterward, has a real claim for that worsening, even though the underlying condition predated the incident.

Why Medical Documentation Is Critical Here

Clear medical records showing your condition and functioning before the accident, compared to after, help establish exactly how much the accident aggravated or worsened your pre-existing condition. Without this comparison, it becomes much easier for an insurer to attribute everything to the prior condition.

This is one of the clearest examples of why being upfront and thorough about your medical history, rather than hoping it does not come up, actually strengthens rather than weakens your claim.

What This Looks Like in Practice

Consider someone with a prior, mild disc bulge that never caused significant symptoms or required treatment. After a car accident, that same area becomes persistently painful and requires physical therapy. The prior condition existed, but the accident is what turned it into a real, symptomatic problem, and that aggravation is generally compensable.

Compare this to someone claiming a knee injury from an accident when their medical records show ongoing, active knee treatment for an unrelated condition in the weeks immediately before the accident, with no meaningful change afterward, a much harder case to connect to the incident itself.

Being Honest About Your Medical History

• Disclose your full medical history to your attorney and treating providers, do not hide or downplay it.
• Describe your functioning before the accident as specifically and accurately as possible.
• Be consistent across all medical providers and any statements you give.
• Let your attorney frame the aggravation argument, this is a normal, well-established part of many personal injury claims.

Why Hiding a Pre-Existing Condition Backfires

Some claimants worry that disclosing a prior condition will hurt their case, and try to minimize or hide it. This almost always backfires, since insurers routinely obtain full medical records during a claim, and inconsistency discovered later damages your credibility far more than an honestly disclosed prior condition ever would.