Skip to main content
Medical & Treatment

What is Aggravation of Injury?

The worsening or exacerbation of a pre-existing medical condition as a direct result of a new accident or traumatic event.

Understanding Aggravation of Injury

Under the eggshell plaintiff rule, a defendant is liable for aggravating a pre-existing condition. The key challenge is proving the extent to which the accident worsened the condition versus the natural progression of the pre-existing condition. Medical records documenting the plaintiff's condition before and after the accident are essential for establishing the degree of aggravation.

Examples

  • 1Rear-end collision aggravating a prior disc bulge into a herniation
  • 2Fall worsening a previously stable knee injury
  • 3Accident causing a previously asymptomatic condition to become painful
Last updated: January 24, 2026
Reviewed by: Quilia Legal Content Team

Help Your Clients Understand Their Case

Quilia makes it easy to communicate complex legal concepts to your clients.