Why Stroke Risk Increases in Winter: Causes and Prevention Tips

12/03/2025

Most people look at winter as a season of warm blankets, hot soups, and slow, cozy mornings. But quietly in the background, something else happens inside our bodies—especially in people who already struggle with blood pressure, cholesterol, or heart issues. 

Winter affects the body more deeply than many of us realize. The temperature outside may drop, but the body works twice as hard to maintain its internal warmth. And in that process, certain hidden risks start to rise. If you or a loved one has ever wondered why strokes are more common in winter—and what to do about it—this guide breaks everything down in a simple, relatable way. 

Let’s scroll down and learn more about the causes of stroke in winters and ways to safeguard yourself in winters.

Read Also: Stroke in Younger Adults: Is It on the Rise? What You Should Know

Spike in Stroke Cases in India in Winters

Experts are alerting people of a seasonal surge in brain stroke incidents as winter draws near. According to neurologists, stroke occurrences rise by 5–10% during the winter months, with roughly 35 patients requiring emergency treatment for stroke daily. Experts link this growth to several reasons, including sedentary lifestyles, stress, high blood pressure in cold weather, diabetes, and higher cholesterol levels. They highlight that prompt treatment and lifestyle improvements can considerably minimize the risk.

Doctors also warn that even younger people are experiencing an increase in stroke incidence. It is alarming that almost four out of ten patients are under 50. Based on the National Centre for Disease Informatics and Research (NCDIR) data, India reports approximately 1.6 million new stroke incidents yearly.

Read Also: Stroke in Younger Adults: Is It on the Rise? What You Should Know

Impact of Cold Weather Effects on Circulation

When the temperature dips, the body reacts instantly to preserve heat. Cold weather causes blood vessels to narrow and blood flow to thicken, which increases the risk of the development of clots, which can ultimately result in a stroke. 

These changes might sound small, but for someone with high blood pressure, diabetes, or existing cardiac problems, they create the perfect environment for a stroke. Imagine the pipes in your home tightening during cold weather. The same tightening happens in your blood vessels.

Read Also: Difference Between Stroke And Heart Attack: Signs And Symptoms

What are the Causes of Increased Stroke Risk in Winters?

Following are the reasons that lead to blockage of blood supply to the brain by triggering the formation of blood clots:

• Atherosclerosis 
• Atrial fibrillation 
• Clotting disorders
• Heart defects 
• Microvascular ischemic disease

If you presently have or have had the history of the following disorders, you are at higher risk of stroke in winters:

• Deep vein thrombosis (DVT)
• Heart attack
• Pulmonary embolism
• Seizures
• Pneumonia

Read Also: Neurosurgery and Stroke: Interventional Procedures and Rehabilitation Strategies

What are the Warning Signs of Stroke?

There are several symptoms of a stroke. Remember, BE FAST to identify the warning symptoms of a stroke in yourself or a loved one:

Sign	What to Look For
Balance	Loss of balance suddenly, unsteadiness in the walk, or inability to stand properly
Eyes	Sudden vision changes or loss in one or both eyes.
Face	Note the smile of the patient. Any drooping on one side of the face is the warning sign.
Arms	Ask them to raise both arms. If one arm drifts downward or feels weak, then it's a warning sign.
Speech	Slurred speech, difficulty finding words, or trouble understanding spoken words.
Time	Act fast. Call emergency services immediately and note the time symptoms began, as this affects treatment options.

What are the Prevention Tips to Minimise the Stroke Risk in Winters?

Being the patient of high blood pressure in cold weather or at a higher risk of a heart attack does not need you to stay indoors all winter. The risk of a heart attack, stroke, or high blood pressure due to the cold (even if you don't have a pre-existing heart ailment) should not keep you home.
Taking a few of the following simple precautions can help in preventing stroke in winters:

• Keep yourself warm.
• Keep monitoring your blood pressure.
• Eat a variety of nutritious foods and keep maintaining a healthy weight.
• Engage in regular physical activity.
• Stay well-hydrated.
• Minimize your stress levels.
• Do not miss your prescribed medications.
• Maintain the normal limits of your blood pressure, cholesterol, and any other medical concerns you may have.
• Quit smoking.

Conclusion

Stroke might happen to anybody, irrespective of the age of the patient. Get medical help promptly if you have any symptoms. According to medical experts, early medical care greatly enhances recovery results. It is regarded as necessary to check blood pressure regularly, maintain physical exercise, eat a balanced diet, and stay away from smoking and excessive drinking. Both of these habits increase the density of blood and stretch blood vessels. As temperatures drop, experts warn everyone—especially those with underlying ailments—to remain active, stay warm, and be aware of stroke symptoms.

After a stroke, it’s important to get the necessary care right away. Eternal Hospital’s stroke care specialists hold years of expertise in improving recovery and quality of life of stroke patients.

Get answers from the top neurologists at Eternal Hospital. Book your consultation now!

FAQs

Q1: Are elderly people more in danger of getting strokes throughout the winter?
A: Yes. Older persons, particularly those with high blood pressure in cold weather, diabetes, or cardiac issues, are more susceptible to temperature dips. Their bodies may not react to cold as rapidly, leaving them more susceptible.

Q2: Can winter induce a stroke in a person who is otherwise healthy?
A: It's uncommon, but likely. Even healthy persons might experience a surge in blood pressure or dehydration during the winter. Long hours in poor conditions, unexpected exposure to chilly air, and inadequate water intake can all increase the risk.

Q3: Is being indoors all winter beneficial in lowering the risk?
A: No. Staying active is truly beneficial. Light walking, stretching, or indoor workouts will keep your circulation going. The idea is to dress adequately when you go outside and avoid excessive cold.

Q4: Can dehydration truly trigger a stroke in winter?
A: Yes. People overlook drinking water during the winter because they are less thirsty. This may cause the blood to thicken somewhat, increasing the risk of a stroke. Warm water, herbal teas, and soups can help you remain hydrated without being chilly.

Q5: Should high blood pressure patients take special precautions in winter?
A: Definitely. Winters can trigger rapid rises in blood pressure. Regularly monitoring your levels, taking medications on schedule, and avoiding strenuous activity in the cold can make a significant impact.