Emergency guidance

Warning signs, and what to do about them.

A dissection is an injury to an artery that feeds your brain. When it causes trouble, it tends to cause it fast. This page is deliberately blunt about when to stop reading and call for help.

The signs, in plain words

Minutes matter with stroke

Sudden, severe head or neck pain that doesn’t feel like normal training soreness. Often one-sided, often described as unlike any pain you’ve had before.
A drooping eyelid with a smaller pupil on the same side (Horner’s syndrome). Easy to dismiss, easy to miss in a mirror — and a classic sign of a carotid injury.
Weakness or numbness on one side of your face, arm, or leg.
Vision loss in one or both eyes, even briefly.
Slurred speech or trouble finding words.
A rhythmic whooshing sound in one ear, in time with your pulse (pulsatile tinnitus).
Sudden dizziness, vertigo, clumsiness, or trouble swallowing — especially relevant for vertebral artery injuries, which feed the back of the brain.

If any of these are happening right now, call emergency services now. Do not finish this page first — even if the symptoms seem to pass after a few minutes.

Why these signs matter

The carotid and vertebral arteries carry blood to your brain. A dissection is a tear between the layers of the artery wall. Blood can push into the tear and form a second channel (a false lumen), narrowing the artery, and clots can form at the injured spot and travel up into the brain, causing a stroke.

That is why the warning signs above are not “keep an eye on it” symptoms. They are “someone drives you, or you call an ambulance, now” symptoms — even if they seem to pass after a few minutes.

It can show up days after training

Symptoms don’t always start on the mats. A dissection can happen during a roll and announce itself hours or days later. If red-flag symptoms appear and you grappled recently, treat them as an emergency and say so: the connection matters to the people treating you.

What to say in the emergency department

Many clinicians rarely see grappling injuries, and “I do jiu-jitsu” doesn’t automatically translate to “my neck gets loaded, compressed, and rotated under force.” Two sentences can change the workup:

“I train Brazilian jiu-jitsu — my neck takes chokes, cranks, and rotational load. I’m worried about a carotid or vertebral artery dissection.”

Naming the injury you’re worried about isn’t self-diagnosing. It’s giving your care team the mechanism they need to decide, with you, what imaging and workup make sense.

What about milder neck pain?

Ordinary training soreness is common, and this site is not here to turn every stiff neck into a crisis. But pain that is sudden, severe, one-sided, or simply different from what your body knows — especially with any of the signs above — is not a “wait and see” situation. When in doubt about red-flag symptoms, call emergency services now. For everything else that worries you, get it checked by a clinician promptly rather than rolling through it.