Ask the person to raise both arms.

If one arm is suddenly weak, numb, or begins drifting downward, don’t wait to see whether it improves.

5. Sudden Speech Problems

A person having a stroke may suddenly slur their words, have difficulty speaking, or struggle to understand what others are saying.

This can be especially noticeable when the person’s speech suddenly seems very different from normal.

6. Sudden Confusion

Sudden confusion or difficulty understanding speech can also occur during a stroke.

It’s particularly concerning when it appears abruptly and is accompanied by weakness, facial drooping, or another neurological change.

7. Sudden Severe Headache

A sudden, severe headache with no known cause can be a stroke warning sign, particularly in certain types of stroke.

A sudden severe headache should never simply be dismissed as an ordinary headache.

8. Temporary Symptoms That Disappear

This is one of the most important points.

Sometimes stroke-like symptoms disappear after minutes or hours. That can happen with a TIA.

The fact that the symptoms disappeared does not mean everything is fine.

A TIA can be a warning that a more serious stroke may follow, and urgent medical evaluation is recommended.

Why “One Month Before” Can Be Misleading

You may see articles online claiming that a stroke gives you a predictable series of warning signs exactly 30 days beforehand.

That’s not how stroke works.

A stroke can occur without obvious warning, while a TIA can produce temporary symptoms before a stroke. But there isn’t a medically established checklist that allows someone to predict, “You’ll have a stroke in one month.”

The key isn’t predicting the date. It’s recognizing symptoms when they happen.

9 Things You Can Do to Lower Your Stroke Risk

The good news is that many stroke risk factors can be addressed.

1. Know Your Blood Pressure

High blood pressure is one of the most important controllable risk factors for stroke.

Have your blood pressure checked regularly and follow your healthcare professional’s recommendations if it’s elevated.

2. Don’t Smoke

Smoking damages blood vessels and increases stroke risk.

Quitting is one of the most meaningful steps you can take for cardiovascular health.

3. Stay Physically Active

Regular physical activity can help with blood pressure, weight, blood sugar, and cardiovascular health.

The American Stroke Association includes physical activity among the major lifestyle measures for lowering stroke risk.

4. Eat a Heart-Healthy Diet

A balanced diet emphasizing nutritious foods while limiting excessive salt, unhealthy fats, and excess calories can help address several stroke risk factors.

5. Manage Diabetes

High blood sugar can damage blood vessels and increase stroke risk.

If you have diabetes, working with your healthcare team to manage it is important.

6. Pay Attention to Cholesterol

High cholesterol can contribute to plaque buildup in arteries.

Your healthcare professional can determine whether lifestyle changes or medication are appropriate for you.

7. Don’t Ignore Atrial Fibrillation

Atrial fibrillation, or AFib, can increase the risk of blood clots and stroke.

If you’ve been diagnosed with AFib, following your treatment plan is important.

8. Maintain a Healthy Weight

Excess weight can contribute to conditions such as high blood pressure, diabetes, and other cardiovascular risk factors.

A sustainable approach to eating and physical activity is more useful than extreme diets.

9. Take Prescribed Medication Correctly

If your doctor has prescribed medication for blood pressure, cholesterol, diabetes, AFib, or another stroke risk factor, take it as directed.

Don’t stop or change medication without discussing it with your healthcare professional.

What Should You Do If Symptoms Appear?

This is the part everyone should remember.

Don’t wait to see if the symptoms disappear.

If someone suddenly develops facial drooping, arm weakness, speech difficulty, vision changes, severe unexplained headache, or sudden balance problems, call emergency services immediately. The American Stroke Association specifically recommends calling 911 for these warning signs, even if the symptoms disappear.

Note the time when the symptoms first appeared. That information can be extremely important to medical professionals.

The Bottom Line

There may not be a reliable “one month before a stroke” checklist—but there are warning signs that everyone should recognize.

Sudden weakness, numbness, facial drooping, speech difficulty, vision changes, balance problems, confusion, or an unexplained severe headache can signal a stroke or TIA.