Can You Sue for Aggravating a Pre-Existing Injury in Tennessee?

Yes. If someone else’s negligence made an existing injury or condition worse, you can recover for that worsening in Tennessee. The rule is old and well settled: a wrongdoer takes the injured person as they find them. You cannot recover for the condition you already had, but you can recover for the aggravation of it caused by the crash, fall, or other incident. Insurance companies lean hard on pre-existing conditions to deny claims, and knowing how the rule actually works keeps that argument from working.

A prior back surgery, arthritis, an old knee injury, or a previous concussion does not disqualify you. It changes what your case has to prove.

What Is the Eggshell Plaintiff Rule?

Tennessee courts have recognized for more than a century that a person who causes harm must accept the injured person as they find them. This is often called the eggshell plaintiff rule.

The point is fairness. If a negligent driver rear-ends two people at the same speed, and one walks away while the other needs fusion surgery because of a fragile spine, the driver does not get a discount for hitting the more vulnerable person. The defendant is responsible for the harm actually caused, even if an unusually susceptible person suffered more than an average person would have.

What Can You Actually Recover?

Here is the distinction that decides these cases. Tennessee’s pattern jury instruction on the subject puts it plainly: a person who has a condition or disability at the time of an injury is not entitled to recover damages for that condition itself, but is entitled to recover damages for any aggravation of that pre-existing condition or disability proximately resulting from the injury.

In practice, you can seek:

• Medical treatment needed because of the worsening
• Additional pain and suffering attributable to the aggravation
• Lost income and reduced earning capacity tied to the change
• Loss of enjoyment of life caused by the decline

What you cannot recover is compensation for the condition as it existed before the incident. The case is about the delta, meaning the difference between where you were and where you are now.

What Proof Do You Need?

This is the part people underestimate. Tennessee requires medical testimony connecting the aggravation to the incident.

A jury generally cannot award damages for worsening a prior injury unless a qualified medical witness testifies that there was a pre-existing condition at the time of the incident and that it was aggravated by the incident. That principle was applied in Pyle v. Mullins, No. E2012-02502-COA-R3-CV (Tenn. Ct. App. Nov. 25, 2013), where a plaintiff who lacked that proof did not get the instruction he wanted.

What builds that proof:

• Prior medical records establishing your baseline before the incident
• Post-incident records documenting the change
• Imaging comparisons, where before-and-after studies exist
• Treating physician opinions linking the change to the event
• Testimony from family, coworkers, and friends about what you could do before and cannot do now

Counterintuitively, your old medical records are often your best asset. They establish exactly how you were functioning before.

What Conditions Come Up Most Often?

• Degenerative disc disease and prior spine injuries or fusions
• Arthritis, including previously asymptomatic arthritis
• Prior concussions or traumatic brain injury
• Old fractures and joint replacements
• Rotator cuff and knee injuries
• Chronic pain conditions
• Anxiety, depression, and PTSD that worsen after a traumatic event

A condition that existed but caused you no symptoms is a common scenario. Many people have degenerative changes on imaging and feel fine until a collision makes those changes painful.

How Do Insurers Attack These Claims?

Expect a predictable playbook:

• Blaming the imaging. They point to degeneration and argue the problem predates the crash.
• Pulling years of records. They comb your history for any mention of the same body part.
• Arguing gaps in treatment. They claim a delay proves you were not hurt.
• Offering a low number early, before the full extent of the aggravation is documented.

Two habits protect you. Be completely honest with your doctors about your prior history, because a concealed condition discovered later damages your credibility far more than the condition itself ever would. And get consistent treatment, since gaps are the easiest thing for an insurer to exploit.

Pre-Existing Injury FAQs

Will my prior injury reduce my compensation?

It narrows what you recover to the aggravation rather than the underlying condition, but it does not bar your claim. Clear before-and-after proof is what protects the value.

Should I tell my doctor about my old injury?

Yes. Full disclosure is both medically necessary and legally protective. Hidden history discovered during litigation undermines otherwise strong claims.

What if I had no symptoms before the accident?

That often strengthens your case. A condition that was present but asymptomatic, then became painful and limiting after the incident, is a classic aggravation claim.

How long do I have to file in Tennessee?

Generally, one year from the date of injury under Tennessee Code Section 28-3-104.

When an Old Injury Becomes a New Problem

Having a medical history is not a weakness in your claim, though insurers work hard to make it feel that way. What matters is documenting how you were functioning before and how that changed, with medical support connecting the two.

The Higgins Firm handles car accident and injury claims involving pre-existing conditions throughout Tennessee. Reach us through our contact page for a free case review. You pay nothing unless we recover money for you.