Stroke & Brain Health
What Is a TIA?
Amarish Dave, DO explains why a transient ischemic attack can cause stroke-like symptoms that improve quickly but still require emergency evaluation.
Watch VideoStroke & Brain Health
What Is a Stroke?
A stroke happens when blood flow to part of the brain is suddenly cut off. Knowing the warning signs — and calling 911 immediately — can save a life.
Written and medically reviewed by Amarish Dave, DO, board-certified neurologist. This page is educational and does not replace an individual medical evaluation.
Direct answer
A stroke happens when blood flow to part of the brain is interrupted. Most strokes are ischemic — caused by a blocked artery. Others are hemorrhagic — caused by bleeding in or around the brain. Either way, brain cells begin to die within minutes, and the functions that part of the brain controls can be lost.
That is why stroke symptoms come on suddenly: weakness or numbness on one side of the face, arm, or leg; trouble speaking or understanding speech; vision changes; loss of balance; or a sudden severe headache. A stroke is always an emergency. Treatment is time-sensitive, and every minute matters — call 911 immediately.
If symptoms are happening now, call 911
This practice does not provide emergency stroke treatment. Sudden face drooping, arm weakness, speech difficulty, vision changes, balance loss, or sudden severe headache should be treated as an emergency even if symptoms improve or disappear.
Key takeaways
- A stroke is an interruption of blood flow to part of the brain.
- Ischemic strokes are caused by a blocked artery; hemorrhagic strokes by bleeding in or around the brain.
- Symptoms start suddenly — weakness on one side, speech trouble, vision changes, or loss of balance.
- Brain cells die within minutes: 'time is brain.'
- Stroke is always an emergency — call 911, do not drive yourself.
- Symptoms that disappear may be a TIA (mini-stroke), a warning sign for future stroke.
- Many strokes are preventable by managing blood pressure, diabetes, cholesterol, heart rhythm, and smoking.
Use B.E. F.A.S.T.
B
Balance loss
E
Eye or vision changes
F
Face drooping
A
Arm weakness
S
Speech difficulty
T
Time to call 911
The American Stroke Association advises calling 911 for these warning signs and not ignoring symptoms that disappear. Symptoms that resolve quickly may be a TIA (transient ischemic attack) — a serious warning sign that still requires emergency evaluation.
Stroke vs. TIA
A TIA causes the same sudden symptoms as a stroke, but the blockage is temporary and symptoms resolve — sometimes within minutes. A TIA does not cause permanent damage on imaging, but it is a warning that a stroke may occur in the future. At the beginning, you cannot reliably tell a TIA from an ongoing stroke, which is why sudden symptoms always mean calling 911. Read more in What Is a TIA?
Reducing stroke risk
Many strokes are linked to risk factors that can be treated. Prevention and follow-up care focus on:
- Blood pressure control
- Diabetes and cholesterol management
- Detecting and treating atrial fibrillation
- Smoking cessation
- Sleep apnea evaluation
- Physical activity and heart-healthy eating
- Medication review and adherence
After a stroke or TIA, ongoing stroke and TIA follow-up care helps manage residual symptoms and reduce the chance of another event. The same vascular health priorities support long-term brain health.
Frequently asked questions
- What is a stroke?
- A stroke happens when blood flow to part of the brain is interrupted, either by a blocked artery (ischemic stroke) or by bleeding in or around the brain (hemorrhagic stroke). Brain cells begin to die within minutes, which is why a stroke is always an emergency.
- What is the difference between ischemic and hemorrhagic stroke?
- An ischemic stroke is caused by a blocked blood vessel and is the most common type. A hemorrhagic stroke is caused by a burst or leaking blood vessel. Both interrupt the brain's blood supply and require emergency treatment.
- What are the symptoms of a stroke?
- Stroke symptoms come on suddenly: weakness or numbness on one side of the face, arm, or leg; trouble speaking or understanding speech; vision changes; dizziness or loss of balance; and sometimes a sudden severe headache.
- Why is a stroke an emergency?
- Treatments that can limit brain damage are time-sensitive. The sooner a person reaches emergency care, the more brain can potentially be saved. This is why doctors say 'time is brain.' Call 911 immediately — do not drive yourself or wait to see if symptoms improve.
- What does B.E. F.A.S.T. mean?
- B.E. F.A.S.T. stands for Balance loss, Eye or vision changes, Face drooping, Arm weakness, Speech difficulty, and Time to call 911.
- What is the difference between a stroke and a TIA?
- A TIA (transient ischemic attack) causes the same sudden symptoms as a stroke, but the blockage is temporary and symptoms resolve. A TIA is a serious warning sign of future stroke risk. At the start you cannot tell them apart, so sudden symptoms always require calling 911. Learn more: What Is a TIA?
- Should you call 911 even if stroke symptoms go away?
- Yes. Symptoms that disappear may be a TIA, which is a warning sign for a future stroke. The American Stroke Association advises calling 911 for sudden stroke warning signs even if they improve or disappear.
- Can strokes be prevented?
- Many strokes are linked to treatable risk factors: high blood pressure, diabetes, high cholesterol, atrial fibrillation, smoking, and sleep apnea. Managing these with your care team significantly reduces stroke risk.
- What happens after a stroke?
- After emergency treatment, follow-up neurological care focuses on recovery, managing residual symptoms, rehabilitation, and preventing another stroke through risk-factor control and medications.
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Need follow-up after a stroke or TIA?
NeurologistCare.com provides non-emergency follow-up after stroke or TIA and risk-factor review. In-person evaluations are available in Crystal Lake and Woodstock, Illinois, and Lake Geneva, Wisconsin, with telehealth available when appropriate for patients physically located anywhere in Illinois or Wisconsin at appointment time.
Medical disclaimer
This information is for general educational purposes and is not individualized medical advice. If stroke or TIA symptoms are happening now, call 911. Eligibility for outpatient follow-up, testing, and prevention treatment requires individualized medical evaluation.
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