Can migraines be secondary to PTSD?

Yes, they can be claimed that way under 38 C.F.R. § 3.310. The nexus opinion needs a migraine diagnosis and an explanation, grounded in your records, of how PTSD caused the headaches or made them worse. VA decides whether the evidence is enough.

What should a nexus letter for migraines secondary to PTSD say?

It should name the migraine diagnosis and the service-connected PTSD, state the opinion as "at least as likely as not," explain the mechanism (stress, hyperarousal, and poor sleep lowering the migraine threshold) with facts from your file, address aggravation if you had headaches before, and deal with other possible causes.

How does VA rate migraines secondary to PTSD?

The same as any migraines: under DC 8100 at 0, 10, 30, or 50 percent, based on how often you have prostrating attacks. It is a separate rating from PTSD, because headaches are not part of the mental health rating formula.

Can Migraines be service-connected as secondary to PTSD?

It can be claimed that way. Under 38 CFR § 3.310, a condition that is proximately due to — or aggravated by — an already service-connected disability can itself be service-connected. Whether VA grants it depends on the evidence in your file, and the decision is made solely by VA adjudicators.

Do I need a nexus letter for a secondary claim?

In most cases yes. The rater needs a medical opinion connecting the two conditions at the "at least as likely as not" (50% or greater) standard. That opinion has to come from a licensed clinician who reviews your records and signs it — a draft is a starting point for that provider, not a substitute for their judgment.

Secondary service connection

Migraines Secondary to PTSD

If VA already rates you for PTSD, migraines can be claimed as secondary under 38 CFR § 3.310 — you do not have to prove it started in service.

Start with Migraines All secondary connections

Already rated

PTSD

Service-connected

The claim

Migraines

Secondary · 38 CFR § 3.310

What the claim needs on paper

A current diagnosis: Migraines
Your service-connected PTSD
A medical opinion linking the two — “at least as likely as not”

The short answer

Migraines secondary to PTSD: can you claim it?

Migraines can be claimed as secondary to service-connected PTSD under 38 C.F.R. § 3.310 when a clinician diagnoses migraine and explains that PTSD at least as likely as not caused the headaches or made them worse. The opinion is stronger when your records show the headaches starting or getting worse after PTSD, or tracking with PTSD flare-ups, stress, and poor sleep. VA rates migraines under DC 8100 at 0, 10, 30, or 50 percent based on how often you have prostrating attacks.

The medical link

Chronic stress and neurological sensitization from PTSD lower the migraine threshold, increasing frequency and severity of headache episodes.

What proves it

Neurology or primary care headache records; migraine diary; nexus letter relating stress-induced cortical spreading to PTSD.

The rule VA applies

38 CFR § 3.310 covers secondary service connection two ways: a condition caused by a service-connected disability, and one aggravated by it beyond its natural progression. Either route works, and a claim can argue both. The standard is “at least as likely as not” — a 50% probability, not proof beyond doubt.

You do not need to show migraines began during service. That is what makes a secondary claim different, and it is the step most veterans do not realise is available to them.

How strong is this claim?

Stress and poor sleep are recognized migraine triggers, and both are part of PTSD, so this is a reasonable theory. It is usually argued as aggravation as much as causation: many veterans had some headaches before, and PTSD made them more frequent or more severe. The claim is weakest when the headache history is thin, when there is no migraine diagnosis (just "headaches"), or when a head injury, neck condition, or medication overuse explains them better. A TBI or neck injury in your file may also be its own route.

How VA rates migraines

Under DC 8100 (38 C.F.R. § 4.124a): 50% for very frequent completely prostrating and prolonged attacks productive of severe economic inadaptability; 30% for characteristic prostrating attacks averaging once a month over the last several months; 10% for characteristic prostrating attacks averaging one in two months over the last several months; 0% for less frequent attacks. A headache diary showing how often you have to stop and lie down is the evidence that sets the level.

What the nexus letter for migraines secondary to PTSD must cover

1
A migraine diagnosis
Migraine named as the diagnosis, ideally by a neurologist or your primary care provider, not just "headaches" in a problem list.
2
The link to PTSD in your history
When the headaches began or worsened relative to the PTSD, and notes that connect attacks to stress, nightmares, or poor sleep.
3
Caused by, or made worse by
Both halves of § 3.310. If you had headaches before, the opinion should explain how PTSD increased their frequency or severity beyond their natural course.
4
Other causes addressed
Head injury, neck conditions, medication overuse, or other triggers in your file, and why PTSD still accounts for the headaches.

What this becomes

Build the documents for this claim

Tell us what's going on in your own words and we'll draft the nexus letter for your provider to review and sign, plus your personal statement and buddy statements.

Start with Migraines

Obstructive sleep apnea DC 6847

Your fileBuilding · 3 of 4

This claim needs: a nexus opinion.

1 · The diagnosisOn record — the VA already conceded it
2 · What happened, and how it affects youYour statement · daily life · a witness
3 · The link to your serviceReady to draft — this answers the denialDraft it →

How VA rates it — your records document the 50% level.

“Patient uses CPAP nightly, compliance 92% of nights.” — sleep study, p. 3

A demo claim, not a customer's — every claim is laid out this way. VA decides every claim.

Straight answers

Common questions

Can migraines be secondary to PTSD?: Yes, they can be claimed that way under 38 C.F.R. § 3.310. The nexus opinion needs a migraine diagnosis and an explanation, grounded in your records, of how PTSD caused the headaches or made them worse. VA decides whether the evidence is enough.
What should a nexus letter for migraines secondary to PTSD say?: It should name the migraine diagnosis and the service-connected PTSD, state the opinion as "at least as likely as not," explain the mechanism (stress, hyperarousal, and poor sleep lowering the migraine threshold) with facts from your file, address aggravation if you had headaches before, and deal with other possible causes.
How does VA rate migraines secondary to PTSD?: The same as any migraines: under DC 8100 at 0, 10, 30, or 50 percent, based on how often you have prostrating attacks. It is a separate rating from PTSD, because headaches are not part of the mental health rating formula.
Can Migraines be service-connected as secondary to PTSD?: It can be claimed that way. Under 38 CFR § 3.310, a condition that is proximately due to — or aggravated by — an already service-connected disability can itself be service-connected. Whether VA grants it depends on the evidence in your file, and the decision is made solely by VA adjudicators.
What is the medical link between PTSD and Migraines?: Chronic stress and neurological sensitization from PTSD lower the migraine threshold, increasing frequency and severity of headache episodes.
What evidence do I need?: Neurology or primary care headache records; migraine diary; nexus letter relating stress-induced cortical spreading to PTSD.
Do I need a nexus letter for a secondary claim?: In most cases yes. The rater needs a medical opinion connecting the two conditions at the "at least as likely as not" (50% or greater) standard. That opinion has to come from a licensed clinician who reviews your records and signs it — a draft is a starting point for that provider, not a substitute for their judgment.

Keep going

Other conditions secondary to PTSD

Veterans rated for PTSD often have more than one of these.

Rated for more than PTSD?

Pick what you're rated for → see what commonly follows.

The free finder maps the secondary conditions that commonly follow every condition you already have — not just this one. No sign-up to look.

Could I qualify for more?

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