How Pre‑Existing Conditions Affect Your Personal Injury Claim in Illinois

If you’re pursuing a personal injury claim in Illinois and have a pre‑existing condition like chronic back pain, arthritis, or a prior injury, you might worry that it will hurt your case. The truth is that pre‑existing conditions don’t prevent you from recovering damages. Illinois law protects individuals with health issues that are worsened by someone else’s negligence.

Here’s what you need to know about how pre‑existing conditions are handled in personal injury claims across the state.

Pre‑Existing Conditions Are Not a Dealbreaker

Illinois courts recognize that people aren’t always in perfect health. If an accident aggravates or worsens a prior condition, the at‑fault party can still be held legally responsible. You’re entitled to compensation for the additional harm caused by the incident, even if your injury built on an already-existing issue.

The “Eggshell Skull” Rule in Illinois

Illinois follows the legal principle often called the “eggshell skull” rule, which holds that a defendant must take the victim as they find them. In other words, even if your body was more fragile due to a pre-existing condition, the person or entity that caused the accident is still liable for all resulting injuries, including the worsened condition.

Medical Evidence Is Key

To prove your case, you’ll need to show how the accident impacted your existing health condition. This usually involves:

• Medical records showing your condition prior to the accident
• New medical exams demonstrating increased pain or limitations
• Diagnostic tests confirming additional damage
• Expert opinions from physicians connecting the worsening of your condition to the accident

The more clearly your doctors can describe the difference in your condition before and after the incident, the stronger your case will be.

Compensation May Still Be Substantial

With the right documentation, you can pursue damages for:

• Medical expenses related to the aggravated injury
• Ongoing treatment or rehabilitation
• Lost wages or reduced earning ability
• Pain, suffering, and emotional distress

Illinois uses a modified comparative fault system, which means your compensation may be reduced if you are found partially at fault, but your pre‑existing condition alone doesn’t count against you.

Legal Support Matters

Insurance companies may try to blame your condition instead of the accident. An experienced Illinois personal injury attorney can help you gather evidence, work with medical experts, and demonstrate how the incident directly worsened your health. At Grewer Law, we know how to build strong claims that account for complex medical histories.