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What happens when an old injury becomes part of a new accident?

Motorcycle crashes are often serious, and when you’re already dealing with a previous injury—whether it’s a bad back, an old fracture, or lingering whiplash—it can raise a lot of questions about how your current claim will be handled. Insurance companies are quick to point out any prior conditions that might lower the amount they have to pay.

Being hurt in a motorcycle accident is overwhelming enough without having to worry about whether your medical history will be used against you.

In this article, we’ll look at how preexisting injuries can affect your motorcycle accident claim, how insurance companies approach these situations, and what you can do to protect your rights. Whether you’re currently dealing with a claim or just want to be prepared, understanding this issue can make a big difference.

Understanding the Role of Preexisting Injuries

If you’ve been in a motorcycle crash and have a medical history that includes past injuries, those old conditions can suddenly become a key part of your new case. This is especially true if the new injury overlaps or aggravates something you were already dealing with.

Insurance adjusters and defense attorneys often look for ways to argue that your current pain isn’t entirely from the accident. That doesn’t mean you aren’t entitled to compensation, but it does mean your claim may face more scrutiny.

The “Eggshell Skull” Rule Still Applies

There’s a long-standing legal principle called the eggshell skull rule. It basically says that a defendant must take the injured person as they find them, even if they’re more vulnerable due to a preexisting condition.

In other words, if your motorcycle crash made your old injury worse, the at-fault driver is still responsible for that aggravation. Courts in most states, including California and New York, recognize this rule. For example, California Civil Jury Instruction 3927 covers the “Aggravation of Preexisting Condition,” making it clear that compensation can be awarded for new harm caused to an already injured area.

Still, you can expect the other side to push back. That’s why good documentation is key.

Medical Records Can Make or Break Your Case

Your medical history isn’t something you can or should hide. But it is something you and your lawyer need to explain clearly.

A strong claim includes:

The more consistent and organized your medical records are, the easier it will be to show that the crash caused a new injury or made an old one worse.

How Insurance Companies Handle Preexisting Conditions

Don’t be surprised if the insurance company orders a full medical review. This is common when a motorcycle injury claim involves preexisting conditions.

They may:

This is where your documentation and legal strategy come into play. A thorough explanation of your medical condition before and after the crash is the best defense against these tactics.

Common Preexisting Injuries That Raise Questions

Some injuries are more likely to be scrutinized than others. These include:

If any of these were part of your medical history, and you’re now dealing with a new motorcycle accident claim, expect those issues to come up during settlement talks—or in court.

Proving Aggravation Versus Reinjury

One of the challenges in cases like this is showing that your current condition is different—or worse—because of the recent crash. Doctors often describe this in two ways:

Both can support a valid claim, but the way they’re presented matters. Testimony from a qualified medical expert can be essential to connect the dots for a judge or jury.

What You Can Do to Strengthen Your Claim

While you can’t change your medical history, you can take steps to avoid letting it hurt your case:

Staying organized and proactive gives your legal team more to work with and gives insurers less room to challenge your claim.

Final Thoughts

Having a preexisting injury doesn’t disqualify you from seeking compensation after a motorcycle accident. But it does add layers of complexity. Insurance companies may try to use your past against you, but with the right documentation, legal knowledge, and expert input, you can still build a strong case.

Knowing how preexisting injuries play into motorcycle accident claims is an important part of being prepared—and protecting your rights after a crash.