Personal Injury

Can a pre-existing medical condition affect my personal injury claim?

By Ted Smith, Attorney · Originally published March 5, 2020. Updated July 16, 2026.

If you already had a bad back, an old knee injury, or a service-connected condition before your accident, you can still recover compensation in Texas. A prior injury does not cancel your claim. What changes is how the claim gets proven: your medical records need to show what got worse, not just that something hurts. Insurers may investigate your prior medical history, and causation is fact-specific. Understanding how Texas law actually treats these cases is the first step to protecting your claim.

Pre-existing conditions do not bar your claim

Almost nobody arrives at an accident in perfect health. Old sports injuries, prior car wrecks, arthritis, and service-connected conditions from military duty are common. Texas law does not require you to have been injury-free before the crash. You are entitled to compensation for the harm the accident caused, including when the accident aggravated or worsened a condition you already had.

The key legal concept here is often called the “eggshell skull rule.” Texas law permits recovery for the aggravation of a pre-existing condition that the accident actually caused, but it does not make the defendant responsible for the underlying condition itself. The injured person must prove the accident-caused aggravation.

What “aggravation” means in a claim

An aggravation claim means the accident made an existing condition worse, or reactivated something that had settled down. For example, a soldier who separated from Fort Hood (formerly Fort Cavazos) with a documented service-connected back injury, and is later rear-ended on I-14, can pursue compensation for the additional damage the crash caused, even though the underlying condition existed first. The same applies to a prior car accident injury that had mostly healed before a new wreck reinjured it.

The challenge in these cases is proof. Your medical team and your attorney need records that separate the baseline condition from the new injury or its aggravation. That is why what you tell your doctors, and what you tell your attorney, matters so much.

Disclose your medical history, don’t hide it

Some people worry that telling their doctor or lawyer about a prior injury will hurt their case. It is the opposite. Full disclosure protects you.

When you see a doctor after an accident, tell them about any prior injuries or ongoing conditions in that same area of your body. This helps your doctor treat you correctly and helps them document the difference between your baseline and your new injury. That documentation becomes evidence.

The same goes for your attorney. An insurance company may investigate prior medical records when evaluating causation. If your attorney does not know about a pre-existing condition and it surfaces during that review, it can look like something was hidden, which damages your credibility even when the underlying claim is legitimate. An attorney who knows the full picture from the start can build the case around it instead of getting blindsided.

How insurers evaluate pre-existing conditions

Insurers may investigate prior injuries, prior claims, or gaps in treatment history when evaluating whether an accident caused the current condition. They may dispute causation when an old injury involves the same body part or joint. Whether the accident caused a new injury or aggravated an existing one depends on the medical records and other facts.

Countering this requires a clear medical narrative: records showing your condition before the accident (or a credible baseline based on your treatment history), and records showing the change after. Consistent follow-up care matters here too. Gaps in treatment make it easier for an adjuster to argue your current pain is unrelated to the crash.

Timing matters

Texas law generally requires a personal injury lawsuit to be filed within two years of the date of the accident, under the Texas Civil Practice and Remedies Code. This deadline applies whether or not you have a pre-existing condition complicating your claim, so it is worth talking to an attorney early rather than waiting to see how your recovery goes.

FAQ

Does a pre-existing injury reduce how much I can recover? It can affect how damages are calculated, since you are compensated for the new injury or the aggravation, not for the underlying condition itself. That is different from being barred from recovery. A clear medical record separating the two is what protects the value of your claim.

Should I tell the insurance adjuster about my medical history myself? Be careful. Insurance adjusters may ask broad questions about pre-existing conditions when investigating causation. It is generally safer to let your attorney manage communications with the adjuster once you have retained one.

What if my prior injury was service-connected and I have a VA disability rating? VA records may be relevant evidence, but a disability rating is a benefits determination and does not necessarily establish a precise medical baseline or prove that an accident aggravated the condition. Their meaning, and any VA reimbursement claim, requires case-specific review.

Can a re-injury of an old accident still be a valid claim? Yes. If a new accident reinjures or worsens a previously healed condition, you can pursue compensation for that new harm, subject to proving the connection with medical evidence.

How soon after the accident should I see a doctor? As soon as possible. Prompt treatment creates a clear timeline and reduces the chance that a gap in care gets used to argue your injury is unrelated to the crash.

Sources

A pre-existing condition can complicate a personal injury claim, but it does not end it. Ted Smith is a former Army JAG officer who served at Fort Hood, opened his private practice in 1976, and currently practices personal injury law. If you are unsure how your medical history affects your case, talk to someone before you talk to the insurance company. Learn more about our personal injury representation, or call or text (254) 690-5688 for a free consultation.