What Is a Carotid Artery Dissection? Symptoms, Causes, and Treatment
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 17, 2026
Quick Answer: What is a carotid artery dissection?
A carotid artery dissection is a rare tear in the wall of a carotid artery, slowing or blocking blood flow to the brain and possibly causing a stroke, even in younger people. [5] It may occur spontaneously or after neck trauma. [5] It can heal on its own, but the stroke risk means seeking care right away. [5]
Key takeaways
A carotid artery dissection is a tear in the wall of one of the carotid arteries in your neck, the arteries that supply blood to your brain. [5]
The tear lets blood flow between the artery's layers, slowing or blocking blood flow to the brain and sometimes causing a complete blockage. [5]
It most often affects people in their 40s or 50s, but it can happen at any age, even in your 30s or younger. [5]
Symptoms range from none at all to sudden stroke, and sometimes pain around your eye is the only sign. [5]
The tear can be caused by neck trauma (car accident, sports injury, forceful coughing) or happen spontaneously. [5]
Treatment includes anticoagulants, antiplatelets, angioplasty, or surgery, but many dissections heal on their own. [5]
In one cohort of fully blocked arteries, about 6 in 10 reopened on their own, [1] and a dissection usually doesn't happen again after treatment. [5]
What the research says
Many blocked arteries reopen on their own, and reopening is linked to fewer strokes. In a cohort of 328 people with cervical artery dissection confirmed on MRI, 97 (29.6%) had a fully blocked artery and did not receive acute revascularization. Of these, 56 (57.7%) showed spontaneous recanalization on follow-up. Over a median follow-up of 8.2 years, 18 of 97 (18.6%) had an ischemic stroke upstream of the affected vessel, and recanalization was independently associated with fewer strokes (odds ratio 0.28, 95% CI 0.09 to 0.90) (Mayer-Suess et al., J Neurol, 2025) [1].
It is still unclear whether blood thinners or antiplatelets work better. An individual patient data meta-analysis of the two randomized trials available (444 patients) found the 90-day composite of stroke, death, or major bleeding occurred in 3 of 218 (1.4%) on anticoagulation versus 10 of 226 (4.4%) on antiplatelet therapy (odds ratio 0.33, 95% CI 0.08 to 1.05, P = .06). The difference was not statistically significant, and anticoagulation was linked to more bleeding events (2 versus 0) (Kaufmann et al., JAMA Neurol, 2024) [2].
Most people do well with modern care. In a retrospective review of 179 people with spontaneous carotid artery dissection treated at one large Chinese center, 168 (93.9%) had a favorable outcome. Among 56 dissections with the mildest pattern (type I), 29 (51.8%) were completely recanalized after antithrombotic therapy. This was a single-center, retrospective study (Zhou et al., J Vasc Surg, 2024) [3].
What Is a Carotid Artery Dissection?
Your carotid arteries are the major blood vessels in your neck. They carry blood to your brain, which makes them some of the most important arteries in your body. A carotid artery dissection is a tear in the wall of one of these arteries. [5]
The tear forms between the artery's layers. This lets blood flow between the layers instead of only through the artery's channel. The blood stays inside your artery, but flow to the brain can slow down, stop, or even become completely blocked. [5]
How Serious Is a Carotid Artery Dissection?
This is a serious condition because of what it does to blood flow. When your brain doesn't get enough blood, you can have a stroke. [5] That stroke risk exists even if you're in your 40s, 30s, or younger [2] [5], ages when most people don't expect a stroke to happen.
Because of that risk, a dissection needs treatment right away. [5] The good news is that the condition can heal itself over time. [5] But in between the tear and the healing, it may cause life-threatening complications like a stroke or bleeding in the brain. [5]
Who Does a Carotid Artery Dissection Affect?
Carotid dissection can happen to anyone at any age. [5] However, it is more common in people in their 40s or 50s. [5] It is rare in children.
How Common Is It?
Carotid artery dissection is rare. It is considered a rare tear of the artery's layers [5], and most people will never experience one in their lifetime.
Is It Contagious?
No. A carotid artery dissection is not contagious. It cannot spread from one person to another. It is a structural problem in the artery wall, not an infection.
Symptoms of a Carotid Artery Dissection
Symptoms vary widely, from none at all to sudden stroke. [5] Sometimes, pain is the only symptom, and that pain is often around your eye. [5]
Pain is sometimes the only warning. Other people notice a combination of neurological signs. Stroke-like symptoms can appear suddenly, so it's important to know what to watch for.
Stroke-like symptoms are a medical emergency. Call 911 or your local emergency number immediately if you develop sudden numbness, weakness, slurred speech, or confusion.
Symptom | What You May Notice |
Pain around the eye | Sometimes the only symptom; pain felt in or behind the eye |
Pain in eye, face, head, or neck | Aching or sharp pain in any of these areas |
Horner's syndrome | Sagging eyelid, lack of sweat, and one smaller pupil on one side of your face |
Abnormal reflexes | Reflexes that don't respond normally during an exam |
Difficulty speaking | Slurred speech or trouble forming words |
Memory problems | New confusion or trouble remembering |
Loss of balance | Dizziness or trouble staying steady on your feet |
Sudden numbness or weakness | Often on one side of the body |
Confusion | Sudden disorientation or trouble thinking clearly |
Horner's Syndrome
One distinctive sign is Horner's syndrome, a pattern that affects one side of your face. It includes three changes happening together: a sagging eyelid, a lack of sweat on one side of your face, and one pupil that is smaller than the other. [5]
What Causes a Carotid Artery Dissection?
The cause is often unknown. [5] But major or minor trauma to your neck can create a tear in your artery wall. [5] The tear can happen spontaneously, with no injury at all, or after a neck injury. [5]
Cause Category | Examples |
Major trauma | Car accident |
Neck movement | Neck extension and rotation |
Physical trauma | Sports-related accident |
Sudden pressure | Forceful coughing or nose blowing |
Spontaneous | Occurs on its own with no clear trigger |
Risk Factors
Anyone at any age can develop a carotid dissection, but certain factors make it more likely. The condition is most common in people in their 40s or 50s. [5]
Risk Factor | Why It Matters |
Connective tissue diseases | Weaken the artery wall structure |
Family history of dissection | Suggests inherited artery-wall weakness |
High blood pressure (hypertension) | Puts extra strain on artery walls |
Hyperhomocysteinemia | Abnormally high homocysteine levels in the blood damage blood vessels |
Injury or trauma to your neck | Can create the tear directly |
Migraine headaches | Associated with a higher dissection risk |
Smoking or tobacco products | Damages blood vessel walls |
How to Lower Your Risk
If you have a condition that raises your risk, following your healthcare provider's instructions can help. [5] Your provider may be able to prevent a dissection or detect it early.
A healthy lifestyle helps manage your blood pressure and minimizes your risk. [5] Practical steps include avoiding tobacco products, eating heart-healthy foods, getting regular physical activity, maintaining a healthy weight, and avoiding activities with a high risk for blunt trauma. [5]
Complications of a Carotid Artery Dissection
A carotid dissection can make your artery narrow and cause a blood clot. [5] From there, several serious complications can follow.
Complication | What Happens |
Brain ischemia | Not enough blood reaches your brain |
Subarachnoid hemorrhage | Bleeding in the space that surrounds your brain |
Pseudoaneurysm | Pooling of blood in a weakened artery wall bulge |
Stroke | Brain damage from blocked or reduced blood flow |
Transient ischemic attack (TIA) | A "mini stroke" with temporary symptoms |
Brain ischemia and stroke are the most dangerous outcomes. That's why early diagnosis and treatment matter so much.
How Is a Carotid Artery Dissection Diagnosed?
Because symptoms vary so widely, a carotid artery dissection can be difficult to diagnose. [5] Some people have no symptoms at all. But a timely diagnosis and treatment can prevent complications or death. [5]
Your provider starts with a physical exam and a medical history, including any other medical conditions and any previous injury to your neck. [5]
Test | What It Shows |
Physical exam | Checks reflexes, face symmetry, and neurological signs |
Medical history | Reveals past conditions and neck injuries |
Ultrasound | Takes pictures inside your neck to show the artery |
CT scan | Detailed images of your neck and/or brain |
MRI / MRA | Detailed soft-tissue images of the artery wall and blood flow |
Angiography | Maps the blood vessels directly to locate the tear |
Your healthcare provider will recommend treatment based on several factors, including your other medical conditions, the cause of the dissection, and whether you've had a stroke or are bleeding. [5]
How Is a Carotid Artery Dissection Treated?
Treatment aims to lower your stroke risk while the tear heals. Options range from medication to surgery.
Medications
Medication is the most common approach. Two medication types are used to protect against blood clots. [5]
Medication Type | How It Works |
Anticoagulants | Break down blood clots or prevent new clots from forming |
Antiplatelets | Stop platelets from sticking together and forming blood clots |
Procedures
Procedures are reserved for more severe cases and are used sparingly. [5]
Procedure | What Happens | When It's Used |
Angioplasty | A procedure opens the narrowed artery, sometimes with a stent placed to keep it open | Used sparingly |
Surgery | Removes the dissection or reroutes blood flow around it | Used sparingly, often when nothing else works |
What Can I Expect After Treatment?
You can expect follow-up visits after treatment. Your provider will repeat imaging scans weeks or months later. [5] These scans show whether the tear is healing and whether the medicine you're taking is working. [5]
Questions to Ask Your Provider
Consider asking your healthcare provider these questions at your visit: What caused this condition? What's the best treatment for me? Is my family at risk for this, too? When should I have my first follow-up visit with you? [5]
Outlook
The prognosis with a carotid artery dissection varies widely, depending on its cause and severity. [5] Some people don't need treatment at all. [5] Others have serious, life-threatening complications. [5]
There is a high risk of stroke, and your outlook depends on whether you get a diagnosis before stroke symptoms appear. [5] A carotid artery dissection may heal itself over time. [5] Your provider can monitor it to catch any worsening or complications early.
In one cohort study of people whose dissection had completely blocked the artery and who did not receive emergency revascularization, about 6 in 10 (56 of 97, or 57.7%) saw the artery reopen on its own during follow-up. [1] Recovery is more likely if you have mild symptoms. [5]
Encouragingly, a carotid artery dissection doesn't usually happen again after treatment. [5]
Prevention
You can't prevent every cause of a dissection, because spontaneous tears have no trigger you can control. But you can lower your risk with a heart-healthy lifestyle: avoid tobacco products, eat heart-healthy foods, get regular physical activity, maintain a healthy weight, and avoid activities with a high risk for blunt trauma. [5]
If you have a condition that raises your risk, follow your provider's instructions closely. [5] Your provider may be able to prevent a dissection or detect it early.
When to Get Emergency Help
Call 911 or your local emergency number right away if you develop stroke-like symptoms: sudden numbness or weakness (especially on one side), slurred speech, confusion, vision changes, or trouble walking. Also seek care immediately for any signs of a dissection, especially if you have risk factors or recently injured your neck. [5]
Living With a Carotid Artery Dissection
A problem with an artery that sends blood to your brain can make anyone anxious. The key is action: if you have signs of a dissection, seek medical attention promptly. Prompt diagnosis and treatment help prevent a stroke. [5]
Don't hesitate to speak up and ask questions. The more you understand your condition, the better you can partner with your healthcare team on monitoring and recovery.
Conclusion
A carotid artery dissection is a rare tear in the wall of one of the arteries that carries blood to your brain. It can happen spontaneously or after neck trauma, and it most often strikes people in their 40s or 50s, though it can affect younger people too. Symptoms range from nothing at all to sudden stroke, and sometimes pain around the eye is the only warning.
The condition is serious because of the stroke risk, but the outlook can be good. Many dissections heal on their own, blocked arteries often reopen without emergency treatment, and the condition usually doesn't return after treatment. The most important step is getting medical care right away.
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Frequently Asked Questions
What is a carotid artery dissection?
A carotid artery dissection is a tear in the wall of one of your carotid arteries, the arteries in your neck that supply blood to your brain. The tear lets blood flow between the artery's layers. [5]
What happens when blood flows between the artery's layers?
The blood stays inside your artery, but flow to the brain can slow down, stop, or become completely blocked. That reduced flow can cause a stroke. [5]
Is a carotid artery dissection rare?
Yes. It is considered a rare tear of the artery's layers. [5] Most people will never have one.
Can a carotid artery dissection cause a stroke?
Yes. When your brain doesn't get enough blood, you can have a stroke. [5] That's why prompt treatment is essential.
Can a stroke from a dissection happen in young people?
Yes. A stroke can happen even if you're in your 40s, 30s, or younger. [5]
What are the most common symptoms?
Symptoms vary widely, from none at all to sudden stroke. Pain around your eye is sometimes the only symptom. [5]
Can a carotid artery dissection have no symptoms?
Yes. Some people have no symptoms at all, which is one reason it can be difficult to diagnose. [5]
What is Horner's syndrome?
Horner's syndrome is a combination of three signs on one side of your face: a sagging eyelid, a lack of sweat, and one smaller pupil. [5]
Why does Horner's syndrome happen with a dissection?
The torn carotid artery runs near the nerves that control the eyelid, sweating, and pupil size on one side of the face.
Can pain be the only symptom?
Yes. Sometimes pain, often around your eye, is the only sign of a dissection. [5]
Where does the pain usually occur?
Pain can occur in your eye, face, head, or neck. [5]
What causes a carotid artery dissection?
The cause is often unknown, but major or minor trauma to your neck can create the tear. It can also happen spontaneously. [5]
What kinds of injuries can cause it?
Car accidents, sports-related accidents, neck extension and rotation, and even forceful coughing or nose blowing can cause the tear. [5]
Can forceful coughing really cause a dissection?
Yes. Forceful coughing or forceful nose blowing are listed as possible causes of the artery wall tear. [5]
Who is most likely to get a carotid artery dissection?
Anyone at any age can get it, but it's more common in people in their 40s or 50s. [5]
Is family history a risk factor?
Yes. A family history of dissection is one of the known risk factors. [5]
What is hyperhomocysteinemia?
Hyperhomocysteinemia means abnormally high levels of homocysteine in your blood. [5] High homocysteine can damage blood vessels.
Does smoking increase the risk?
Yes. Smoking or using other tobacco products is a known risk factor. [5]
Do connective tissue diseases increase the risk?
Do migraines increase the risk?
What complications can a dissection cause?
Complications include brain ischemia (not enough blood to the brain), subarachnoid hemorrhage, pseudoaneurysm (pooling of blood), stroke, and TIA (mini stroke). [5]
What is brain ischemia?
Brain ischemia means not enough blood is reaching your brain. [5]
What is a subarachnoid hemorrhage?
A subarachnoid hemorrhage is bleeding in the space that surrounds your brain. [5]
What is a pseudoaneurysm?
A pseudoaneurysm is a pooling of blood [5] that forms when the artery wall is damaged.
What is a TIA?
A transient ischemic attack (TIA) is a "mini stroke", a temporary episode of stroke-like symptoms caused by a brief interruption of blood flow.
Why is it hard to diagnose?
Symptoms vary so widely, from none to sudden stroke, that the condition can be difficult to recognize. [5]
How do doctors diagnose a carotid artery dissection?
Through a physical exam, medical history, ultrasound, CT scan, MRI/MRA of the neck and/or brain, and angiography. [5]
What does the ultrasound show?
The ultrasound takes pictures inside your neck to show the carotid artery and any damage to it. [5]
When are CT or MRI used?
A CT scan or MRI/MRA of your neck and/or brain gives detailed images of the artery wall and blood flow.
What is angiography?
Angiography is a test that directly images your blood vessels to locate the tear.
How is a carotid artery dissection treated?
Treatment to lower stroke risk includes anticoagulants, antiplatelets, angioplasty (sometimes with stenting), or surgery to remove the dissection or reroute blood flow. [5]
What are anticoagulants?
Anticoagulants are medications that break down blood clots or prevent new clots from forming. [5]
What are antiplatelets?
Antiplatelets are medications that stop platelets, which are blood cells, from sticking together and forming blood clots. [5]
What is angioplasty?
Angioplasty is a procedure to open the artery, sometimes with stenting to keep it open. It is used sparingly. [5]
When is surgery used?
Surgery removes the dissection or reroutes blood flow around it. It's used sparingly, often when nothing else works. [5]
Can a carotid artery dissection heal on its own?
Yes. A carotid artery dissection may heal itself over time. Your provider can monitor it to detect complications early. [5]
What are the chances of recovery?
Recovery varies. In one cohort of people whose dissection had completely blocked the artery and who did not have emergency revascularization, about 6 in 10 (57.7%) saw the artery reopen on its own. [1] Recovery is more likely with mild symptoms. [5]
Does a dissection usually happen again after treatment?
No. A carotid artery dissection doesn't usually happen again after treatment. [5]
Can you prevent a carotid artery dissection?
You can lower your risk with a healthy lifestyle, but spontaneous tears have no controllable trigger. Following your provider's instructions may help prevent a dissection or detect it early. [5]
How do I lower my risk?
Avoid tobacco products, eat heart-healthy foods, get regular physical activity, maintain a healthy weight, and avoid activities with a high risk for blunt trauma. [5]
Should I avoid certain activities?
Yes. Avoid activities with a high risk for blunt trauma to the neck. [5]
What should I do if I have symptoms?
Seek medical care right away for any signs of a dissection, especially if you have risk factors or recently injured your neck. [5]
When should I call 911?
Call 911 or your local emergency number immediately for stroke-like symptoms: sudden numbness or weakness, slurred speech, confusion, or trouble walking.
What follow-up care should I expect?
Follow-up visits with repeated imaging scans weeks or months later. These check whether the tear is healing and whether your medication is working. [5]
What questions should I ask my provider?
Ask what caused the condition, what the best treatment is for you, whether your family is at risk, and when to have your first follow-up visit. [5]
Is my family at risk?
Family history is a known risk factor [5], so ask your provider whether your family members should be evaluated.
Can high blood pressure contribute?
Yes. High blood pressure (hypertension) is a known risk factor [5] because it strains artery walls.
Can a dissection cause a complete blockage?
Yes. In some cases, the dissection can cause a complete blockage in your carotid artery. [5]
Does the dissection only affect one artery?
A dissection affects the artery where the tear occurs, but you have two carotid arteries, one on each side of your neck.
What is the prognosis?
The prognosis varies widely depending on cause and severity. The outlook is better when the diagnosis happens before stroke symptoms appear. [5]
How does prompt treatment help?
Timely diagnosis and treatment can prevent complications or death [5], mainly by reducing stroke risk while the tear heals.
Can I live a normal life after a dissection?
Many people recover well. The dissection may heal on its own, and it usually doesn't recur after treatment. [5] Your provider can tell you what to expect in your situation.
Is a carotid artery dissection the same as carotid artery disease?
No. Carotid artery disease usually refers to plaque buildup (atherosclerosis), while a dissection is a tear in the artery wall layers.
Can a dissection cause memory problems?
Yes. Reduced blood flow to the brain can cause memory problems and confusion.
Can a dissection cause balance problems?
Yes. Abnormal reflexes and loss of balance are among the possible symptoms. [5]
What is the bottom line?
A carotid artery dissection is a rare but serious tear in a neck artery that supplies your brain. Symptoms can be subtle, the stroke risk is high, and prompt medical care is essential, but the condition often heals and usually doesn't return.
Related Reading
Stroke: Symptoms, Causes, Diagnosis, and Treatment — A Complete Guide
Transient Ischemic Attack (TIA): The Mini-Stroke That Is Actually a Warning
Subarachnoid Hemorrhage (SAH): Symptoms, Causes, and Emergency Care
Understanding Pseudoaneurysm: Causes, Symptoms, and Treatment
Connective Tissue Diseases: Types, Symptoms, and Treatment Options
References
Mayer-Suess L, Kaufmann JE, Scherer L, et al. Impact of spontaneous recanalization of occlusive cervical artery dissection on risk of stroke. J Neurol. 2025;272(9):627. PMID: 40935924. https://doi.org/10.1007/s00415-025-13371-y
Kaufmann JE, Harshfield EL, Gensicke H, et al. Antithrombotic treatment for cervical artery dissection: a systematic review and individual patient data meta-analysis. JAMA Neurol. 2024;81(6):630-637. PMID: 38739383. https://doi.org/10.1001/jamaneurol.2024.1141
Zhou B, Hua Z, Li C, et al. Classification and management strategy of spontaneous carotid artery dissection. J Vasc Surg. 2024;80(4):1139-1148. PMID: 38777158. https://doi.org/10.1016/j.jvs.2024.05.031
Blum CA, Yaghi S. Cervical artery dissection: a review of the epidemiology, pathophysiology, treatment, and outcome. Arch Neurosci. 2015;2(4):e26670. PMID: 26478890. https://doi.org/10.5812/archneurosci.26670
Cleveland Clinic. Carotid Artery Dissection. Cleveland Clinic Health Library. Last updated December 12, 2025. https://my.clevelandclinic.org/health/diseases/22697-carotid-artery-dissection
Medical disclaimer
This article is for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or another qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay seeking it because of something you have read in this article. If you think you may have a medical emergency, call your doctor or 911 immediately.
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