Lifestyle
A Blocked Neck Artery Often Has No Symptoms Until a Mini-Stroke. Signs of Carotid Artery Disease to Know
By Curtis Jones · October 24, 2026
Two large arteries run up the sides of your neck, one on each side, carrying blood to the brain and head. When they slowly narrow, most people feel nothing at all. That silence is what makes carotid artery disease dangerous.
MedlinePlus explains that the arteries become narrow or blocked usually because of atherosclerosis, a buildup of plaque made of fat, cholesterol, calcium and other substances in the blood. Too much plaque can block blood flow, or a piece of plaque or a clot can break off and lodge in a smaller artery in the brain. Mayo Clinic says the condition causes about 10% of strokes.
The disease often develops slowly, and Mayo Clinic says the first sign might be a stroke or a transient ischemic attack, or TIA. A TIA is a brief shortage of blood flow to the brain that does not cause permanent damage. MedlinePlus says it typically lasts a few minutes, with symptoms that usually go away within an hour.
These are the warning signs to know, drawn from Mayo Clinic, the CDC and the Texas Heart Institute.
Sudden numbness or weakness on one side. The face, arm or leg may go numb or weak, often on just one side of the body. One side of the smile may droop, or one arm may drift down when both are raised.
Sudden trouble speaking or understanding. Words may come out slurred or strange, or what others say may not make sense. The CDC also lists sudden confusion.
Sudden vision trouble. Mayo Clinic lists sudden trouble seeing in one or both eyes. The Texas Heart Institute specifically names loss of eyesight or blurry eyesight in one eye.
Sudden dizziness or loss of balance. The CDC adds trouble walking and a lack of coordination.
A sudden, severe headache. Both Mayo Clinic and the CDC list a severe headache with no known cause.
A whooshing sound your doctor hears. This one you cannot feel. MedlinePlus says a doctor listening to the artery with a stethoscope may hear a bruit, a whooshing sound. The Texas Heart Institute cautions that the test can mislead, because a bruit may be missing even when the disease is severe and may be heard when a blockage is minor.
Do not wait out symptoms that pass. The CDC says that if stroke symptoms go away after a few minutes, you may have had a TIA, and that it is a sign of a serious condition that will not go away without medical help. Because TIAs clear up, the agency says, many people ignore them. Mayo Clinic advises emergency care for any stroke symptoms and says a TIA puts you at risk of a stroke. The CDC says to call 911 rather than drive, and to note the time symptoms started.
Know your risk. Mayo Clinic lists high blood pressure, tobacco use, diabetes, high LDL cholesterol and triglycerides, a family history of atherosclerosis or coronary artery disease, age, obesity, sleep apnea and lack of exercise. It advises talking with your provider about risk factors even if you have no symptoms.
Screening is not routine. The U.S. Preventive Services Task Force recommends against screening for carotid narrowing in adults without symptoms, finding the harms outweigh the benefits. When doctors suspect it, the Texas Heart Institute says Doppler ultrasound can check blood flow in the arteries. Treatment may include lifestyle changes, medicines, surgery to remove plaque, or a stent, according to MedlinePlus.
This article is for general information and is not medical advice. If you notice signs of a stroke, even ones that fade, call 911. Talk with your doctor about your own risk factors. This article was produced with the assistance of AI and fact-checked against the sources cited by LightWave Reports.