Eggshell Plaintiff Doctrine: Cases & Pre-Existing Conditions

If you were hurt in an accident and you already had a bad back, a cranky knee, or any other condition that made the injury worse than it would have been for a perfectly healthy person, Texas law does not let the other side use that old injury against you. The rule that protects you is called the “eggshell plaintiff” doctrine. You may also see it called the “eggshell skull” rule or the “thin skull” rule.

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Here is the general idea: If you got injured due to someone else’s negligence, the person who hurt you needs to pay for the full harm they caused you, even if a healthier person would have walked away with a bruise.

Your pre-existing condition does not get them a discount and you deserve full compensation.

Where Does the Eggshell Plaintiff Rule Come From?

The eggshell plaintiff doctrine comes from old common law, traced back to English courts and adopted in every American jurisdiction. The legal shorthand judges and lawyers still use is “a tortfeasor takes his victim as he finds him.” (Tortfeasor is just a fancy word for the person whose negligence caused the harm.)

The logic is really quite simple and makes a lot of sense. Without the rule, a negligent driver who happened to hit a seventy-year-old with osteoporosis would owe less than if that same driver hit a hearty, healthy twenty-five-year-old. The law does not work that way. You take the road as you find it, and you take the person you injure the same way.

How Does Texas Actually Apply the Rule?

Texas does not have a standalone eggshell plaintiff statute. Instead, the rule is built into the instructions a judge gives the jury, called the “Texas Pattern Jury Charges.” These are the standard instructions a judge reads to the jury at the end of every personal injury trial in this state.

Two of those instructions matter for our purposes.

The first is PJC 28.8B. It tells the jury that if your pre-existing condition was made worse by the accident, the defendant has to pay for that worsening. Period.

The second is PJC 28.8C. Added to the instructions in a 2020 update, it is important because it covers that scenario where someone had a condition they did not even know about before the accident.

Example: Plenty of people are walking around with, say, a herniated disc that has never really bothered them. It happens more often than you would think. The disc has been sitting there for years, minding its own business. Then a rear-end collision on the Sam Houston Tollway turns that quiet disc into a screaming one, and now you cannot lift your kid out of a car seat. PJC 28.8C says you can still recover for the new symptoms, even if the post-accident MRI shows wear that the defense would argue was there before the wreck. Because of PJC 28.8C., the defendant does not get to point at the films and say “see, this disc was always going to fail.”

The Fifth Circuit Court of Appeals, which covers all of Texas, has applied the rule the same way. In a 2017 case called Koch v. United States, the court rejected the government’s argument that the defendant should only pay for “aggravation” of a pre-existing condition rather than the full development of symptoms after the accident. The Fifth Circuit said no, the defendant takes the plaintiff as they find them and that includes paying for the full consequences that flowed from the accident, even if a healthier person would not have suffered those same consequences.

Young man benefiting from Texas eggshell plaintiff doctrine

Reasonable Applications of the Eggshell Plaintiff Rule

Let’s consider the construction worker who had a herniated disc surgically repaired five years ago. He returned to full work with no restrictions, no flare-ups, and no missed shifts. Then, on the way home from a jobsite one day, he gets rear-ended at a red light. The disc re-herniates, he needs revision surgery, and he is out of work for six months.

Our construction worker is your classic eggshell plaintiff. So what is he legally allowed to recover?

He cannot recover anything from the original surgery five years ago; that one was already paid for and was not caused by the wreck. But he can recover for all of the pain and suffering and lost wages, etc. stemming from the consequences of this wreck. This is the eggshell rule working the way it is supposed to.

For another example, let’s consider a woman in her sixties who has osteoarthritis in her neck, but it has never bothered her. Imaging would have shown it if anyone had ever ordered imaging, but nobody had because there was no need. But then she gets rear-ended on I-45 and now has chronic neck pain and headaches that she never had before.

She is another classic eggshell plaintiff and PJC 28.8C was built for her. She can recover full compensation for all of her symptoms, even though she had osteoarthritis and never had problems previously.

Finally, what about the roofer who had a concussion two years ago, fully recovered, who returned to work, and who goes a year and a half without a single complaint? He then falls off a defective scaffold and hits his head again. The second concussion stacks on the first and turns into post-concussive syndrome. Our roofer can recover for the post-concussive syndrome even though a man with no prior concussion might have shaken off the second hit.

What do all three have in common?

In each of these scenarios, the plaintiff would not be getting compensation for the underlying condition. Rather, they would get compensation for the new harm that flowed from the defendant’s negligence.

When Invoking the Eggshell Plaintiff Rule Crosses the Line

Now let’s look at the other side.

Bill has had chronic low-back pain for a decade and has been treating twice a week for just as long. He then gets into a minor parking-lot fender-bender and reports the same level of pain he was having the week before, asserting that the accident was the cause of his back pain. But because Bill’s pre-accident chart and his post-accident chart will look identical, there will be no evidence of aggravation, and so, even though Bill is also an eggshell plaintiff, he would see no compensation for his injuries.

Another way that an injured party can ‘go too far’ is by alleging that a condition that is progressive and was going to get worse anyway was the fault of the defendant. An example can help illustrate this point: Say that Jillian had degenerative disc disease that has been visibly progressing on imaging for a decade. She was then in a small car accident and tries to claim the entire trajectory of that disease is the defendant’s fault.

Will that fly? No.

Texas has a name for the defense’s counter-argument. It is called the “crumbling skull” rule. The idea is that some conditions are going to deteriorate whether or not the accident happens, and as such, the defendant is not on the hook for the part of the deterioration that was coming. Jillian’s disc was going to get worse with or without the accident. The crumbling skull rule lets her recover for what the wreck actually accelerated or added, but not for the underlying disease, which was going to keep deteriorating either way.

Note: The eggshell rule and the crumbling skull rule do not contradict each other. The eggshell rule covers what the accident caused. The crumbling skull rule says the defendant does not pay for what would have happened on its own, even if there was negligence.

Texas eggshell plaintiff rule example

What Makes a Strong Eggshell Case in Texas?

A few things separate the cases that work from the ones that do not.

Clean records come first: If your back was bothering you before the accident, your medical records need to show clearly what your pre-accident baseline looked like; that way a doctor can show what changed afterward. Hiding the prior condition is the worst possible move. Naming the issue openly, and showing how it differs from the post-accident reality, is the best course.
A treating physician matters far more than a hired expert: A doctor you have actually seen, who can credibly tell a jury “this accident is what made the difference,” carries a lot more weight than a courtroom expert hired for trial.
Do not delay: A long gap in treatment after an accident hurts your case. If you wait eleven months to see a doctor about accident-caused back pain, the defense will argue that something else happened in those eleven months. It is better to see a doctor early, even if it feels like the injury might be minor.
Fully disclose: Texas defense lawyers have access to your medical records once you file suit and there are no secrets in a deposition. Hiding a condition or injury and hoping it does not come out is how a strong case turns into a losing one.

While these are fairly straight-forward, each piece matters more than people think (especially when you’re sitting under oath in front of a jury). The strongest cases are built off of strong evidence, and a good lawyer will ensure you not only win your case, but secure the maximum available compensation for your situation.

When to Work with a Personal Injury Lawyer

If you were hurt by someone else’s negligence, your pre-existing condition is not the end of your case. In fact, the eggshell plaintiff rule is on your side. But how it applies depends on the facts, so it is best to speak with a Texas personal injury lawyer from Armstrong Lee & Baker LLP. Not only do they have extensive experience handling cases involving pre-existing conditions, but they know how to best leverage the facts to secure the maximum available compensation. Contact us today for a free consultation.

Joshua Lee

Joshua Lee believes in aggressive, tough advocacy and a client-centered approach to every case. Joshua draws from a wide body of experiences and a robust understanding of the law. Joshua graduated from the New York University School of Law in New York City, which is considered among the best law schools in the world. Our lawyers have 25+ years of combined experience.