Causation

What is causation?

Causation connects the breach to the harm. A defendant can have been undeniably careless and still owe nothing if their carelessness did not actually cause your injury.

The law splits it in two. Actual cause asks whether the injury would have happened without the defendant's conduct, and proximate cause asks whether the connection is close enough that responsibility should attach.

Why do insurers focus on causation?

Because it is the element where doubt is easiest to manufacture. Liability is often clear from a police report, and damages are documented in bills. Causation lives in medical opinion, where reasonable experts can disagree.

The standard arguments are predictable. Your imaging shows degenerative change common at your age, you had a prior injury to the same region, you waited before seeking treatment, or a later event intervened.

Timing arguments carry particular weight. A delay between the incident and first treatment gives the defense a foothold, which is why prompt evaluation matters even when symptoms seem manageable at first.

How is causation proven?

Medical causation is built through the record rather than asserted.

Photographs of the scene and vehicle damage help as well, because the mechanism of injury has to make medical sense. A physician explaining how a particular impact produces a particular injury is far more persuasive than the diagnosis standing alone.

• Prompt evaluation after the incident, establishing a clear timeline
• Consistent treatment without an unexplained gap
• Imaging and diagnostic testing that corresponds to reported symptoms
• Prior records showing your baseline before the incident
• A treating physician's opinion connecting the mechanism of injury to the diagnosis

What if I already had a similar condition?

A pre-existing condition does not defeat a claim. New Jersey compensates aggravation of an existing condition, so worsening a vulnerable back is still a compensable harm.

The eggshell plaintiff rule reinforces this. A defendant takes you as they find you, so unusual fragility is the defendant's problem rather than a discount on your claim.

The distinction the law draws is between causing a condition and worsening one. Both are compensable, though the second requires clear evidence of your baseline before the incident.

Common questions

What if my symptoms did not appear until days later?

Delayed onset is common and medically well recognized, particularly with whiplash and concussion. Documenting when symptoms began and seeking evaluation promptly once they do helps establish the connection.

Can more than one thing cause my injury?

Yes. The law does not require the defendant to be the only cause, only a substantial contributing one. Multiple causes are allocated among responsible parties.

Do I need an expert to prove causation?

For most physical injuries a treating physician's opinion carries it. Complex or disputed cases often require a retained expert witness as well.

What if I was injured in a second accident during my recovery?

Both incidents may be compensable, and the analysis separates what each contributed. Where the harm cannot be neatly divided, apportionment becomes a central issue requiring medical testimony about which injury produced which consequence.