How do I prove my accident made my migraines worse when I had a preexisting condition?: North Carolina

Recent Legal Update

Updated: October 2026

This article has been updated to clarify venue under N.C. Gen. Stat. § 1-82 and the proper trial-court division under N.C. Gen. Stat. § 7A-243. The prior version indicated that an ordinary auto-injury lawsuit could generally be filed where the crash occurred; the current general venue rule instead focuses on the county where a plaintiff or defendant resides, subject to statutory exceptions.

The three-year limitations period under N.C. Gen. Stat. § 1-52 remains unchanged. The medical-causation discussion was also clarified because North Carolina law does not require a provider to use the exact phrase “reasonable degree of medical certainty,” although the evidence must establish probable rather than merely possible causation. These corrections may materially affect where a lawsuit is filed and how medical proof is presented.

Short Answer

In North Carolina, you can recover for the aggravation of a preexisting condition if you prove the crash more likely than not made your migraines worse. Focus on clear before-and-after proof: your baseline symptoms, the post-accident change, and a medical opinion tying that change to the crash. Consistent treatment records, a provider narrative, and corroborating evidence (like a headache diary) strengthen your claim.

Understanding the Problem

You want to know how, under North Carolina personal injury law, you can show that an auto accident worsened your existing migraines and concussion symptoms. The key decision point is proving aggravation: can you demonstrate a measurable change after the crash that a medical provider connects to it? Here, you already had ongoing migraines before the accident, and the insurer has only reviewed limited urgent care and neurology records.

Apply the Law

North Carolina allows recovery when someone’s negligence aggravates a preexisting condition. The defendant must take you as they find you, but you still carry the burden to prove the accident caused a worsening. Recovery for aggravation is generally limited to the additional injury caused by the aggravation beyond what the preexisting condition would have caused in its normal course. For medical issues like migraines or post-concussion symptoms, insurers and courts expect documentation of your baseline, the post-accident change, and a qualified medical opinion establishing probable—not merely possible—causation. Personal injury lawsuits are filed in North Carolina trial courts, and most claims must be filed within three years after the claim accrues, which is usually the accident date when the injury is immediately apparent.

Key Requirements

Negligence and causation: Show the other party’s fault and that the crash more likely than not aggravated your condition.
Baseline proof: Provide pre-accident records showing the frequency, severity, and impact of your migraines before the crash.
Post-accident change: Provide records showing increased frequency, severity, duration, new symptoms, or added limitations after the crash.
Medical linkage: Obtain a treating provider’s clear opinion that the crash probably caused the worsening. No single formula or exact phrase is required, but an opinion based only on possibility or speculation may be insufficient.
Damages documentation: Tie the worsening to medical care, medications, work or school impact, and daily-life limitations.
Apportionment if possible: If your provider can separate old versus new symptoms, present that; if not, focus on clear evidence of the additional harm caused by the aggravation.

What the Statutes Say

N.C. Gen. Stat. § 1-52 - generally provides a three-year limitations period for personal injury claims and addresses when a claim accrues.
N.C. Gen. Stat. § 1-82 - provides the general county-venue rule based primarily on where the parties reside.
N.C. Gen. Stat. § 7A-243 - generally assigns civil actions involving $25,000 or less to the district court division and actions exceeding $25,000 to the superior court division.
N.C. Gen. Stat. § 8C-1 (North Carolina Rules of Evidence) - governs proof at trial, including lay and expert testimony about medical causation.

Analysis

Apply the Rule to the Facts: Because you had migraines and concussion symptoms before the crash, your claim turns on proving a specific worsening afterward. The insurer has only seen limited records, so they may not see your full baseline or the change. Expanding the record—pre- and post-accident neurology notes, medication changes, and a treating provider’s causation letter—can show the crash more likely than not made your migraines worse and support a higher valuation.

Process & Timing

Who files: You or your attorney. Where: You may first present the claim to the at-fault driver’s insurer. If unresolved, file a Complaint and Civil Summons through the clerk’s office in a county permitted by N.C. Gen. Stat. § 1-82—generally a county where a plaintiff or defendant resides, with special rules when no defendant resides in North Carolina. The proper district or superior court division generally depends on whether the amount in controversy is $25,000 or less or exceeds $25,000. What: Submit relevant medical records or an appropriately limited authorization to the insurer; request a treating neurologist narrative; if filing suit, use a Complaint and a Civil Summons (AOC-CV-100) from nccourts.gov. When: Most personal injury lawsuits must be filed within three years after the claim accrues, usually the crash date when the injury is immediately apparent.
Build the proof: Collect 12–24 months of pre-accident records to show baseline; all post-accident urgent care, neurology, therapy, and medication records; a headache diary; work/school attendance records; and brief statements from family or coworkers who observed changes. Ask your treating neurologist to explain why the crash probably aggravated your condition and describe the degree of change.
Resolution: Submit the updated package to the adjuster and negotiate. If settlement stalls, proceed with litigation and, as needed, schedule your provider’s testimony or a deposition to explain causation and aggravation.

Exceptions & Pitfalls

Contributory negligence: If your own negligence was a proximate cause of the crash or injury, North Carolina’s contributory-negligence rule can bar recovery; gather evidence on liability early.
Gaps or inconsistent histories: Large breaks in treatment or inconsistent symptom reports weaken causation; keep appointments and use a headache diary.
Overbroad medical releases: Limit releases to relevant timeframes and providers to avoid disputes over unrelated history.
No medical opinion: Bills alone may not prove aggravation; obtain a clear treating-provider opinion that the crash probably worsened your migraines.
Intervening causes: New incidents after the crash can muddy causation; document any later events and how your symptoms tracked over time.

Conclusion

To prove an accident worsened your preexisting migraines in North Carolina, show a clear baseline, a measurable post-crash change, and a treating provider’s opinion that the crash probably caused the aggravation. Support that with consistent medical care, a headache diary, and corroborating records. If settlement does not reflect this evidence, file a complaint in the proper North Carolina county and court division within the applicable three-year period to preserve your claim.