How Drinking Coffee Can Raise Your Stroke Risk

It might sound dramatic—but something as simple as drinking a cup of coffee could put you at real risk for a fatal stroke. According to Dutch researchers, everyday actions that seem harmless may actually cause a sudden spike in blood pressure, leading to a specific and often deadly form of stroke called subarachnoid hemorrhage (SAH).

Yes, drinking coffee, having sex, getting angry, or even blowing your nose can temporarily raise your blood pressure enough to trigger a life-threatening brain bleed in certain people. Over half of those who suffer this kind of stroke die, often very quickly.

What Is Subarachnoid Hemorrhage?

Subarachnoid hemorrhage is a type of stroke caused by bleeding into the space surrounding the brain, specifically when a blood vessel on the brain’s surface suddenly ruptures. This leads to damage in brain tissue and is often fatal. Around 10–15% of patients die before reaching the hospital, and roughly 50% pass away within a month of the event. In the UK alone, about 8,000 people experience this type of stroke each year, with middle-aged individuals—especially women—at higher risk.

The Surprising Daily Habits That Spike Blood Pressure

Dutch scientists from Utrecht University Medical Center studied patients who had suffered a subarachnoid hemorrhage. They asked these individuals what they were doing in the hour before their stroke. The researchers wanted to know if they had consumed a soda, exercised, blown their nose, or experienced strong emotions like anger or surprise. Crucially, they also asked whether these activities were routine or rare for the patient. By analyzing patterns, the team pinpointed eight common activities that were linked to sudden blood pressure surges and increased stroke risk.

The Eight Risky Activities Identified

The study, published in the American Heart Association journal Stroke, identified the following everyday actions as potential triggers:

• Drinking a cola or other carbonated beverage
• Having sex
• Feeling intense anger
• Experiencing surprise or shock
• Blowing your nose forcefully (like when you have a cold)
• Straining on the toilet
• Jumping or engaging in similar physical activity
• Drinking coffee

While none of these actions are inherently dangerous for most people, they can cause brief but extreme increases in blood pressure—enough, in susceptible individuals, to rupture a vulnerable blood vessel in the brain.

Why Coffee Matters in Stroke Risk

Coffee, a staple for millions worldwide and a daily ritual for many coffee professionals, was one of the flagged activities. While moderate coffee consumption is generally considered safe and even beneficial for most people, the caffeine and the act of drinking it can cause a short-term rise in blood pressure. For individuals with undiagnosed vascular weaknesses or predispositions, that spike may be enough to trigger a catastrophic event like a subarachnoid hemorrhage.

Frequently Asked Questions

Can drinking coffee really cause a stroke?

Drinking coffee itself doesn’t directly cause a stroke, but it can cause a temporary spike in blood pressure. For people with hidden vascular issues, that sudden increase may be enough to rupture a weakened blood vessel in the brain, leading to a subarachnoid hemorrhage—a severe and often fatal type of stroke.

What is subarachnoid hemorrhage and why is it so deadly?

Subarachnoid hemorrhage is a stroke caused by bleeding around the brain when a blood vessel on its surface ruptures. It’s deadly because it often causes rapid brain damage, with 10–15% of patients dying before hospital arrival and about 50% passing away within a month.

Are everyday activities really stroke risks?

Ordinary actions like sneezing, drinking coffee, or having sex aren’t dangerous for most people. But if you have an undetected weak blood vessel, these activities can cause a sudden blood pressure surge that may trigger a life-threatening brain bleed.

Who is most at risk for this type of stroke?

Middle-aged individuals, especially women, are more likely to experience subarachnoid hemorrhage. However, anyone with unknown vascular vulnerabilities could be at risk from everyday activities that cause blood pressure spikes.

Should I stop drinking coffee to avoid stroke?

There’s no need to stop coffee entirely if you’re healthy and tolerate it well. But if you have high blood pressure or vascular concerns, it’s worth discussing caffeine intake with a doctor, as even coffee can contribute to dangerous blood pressure spikes.

Recommended FrontStreet Beans for Coffee Lovers

FrontStreet Coffee’s Ethiopia Humbera offers bright, juicy notes of red cherry and strawberry candy—perfect for those who love fruity, vibrant cups. Their Classic Blend delivers a balanced, smooth profile ideal for daily drinking without excessive stimulation. For a deeper experience, try the Black Cocoa Blend with its rich chocolate tones and mild acidity. All three are thoughtfully roasted to highlight unique flavour profiles while maintaining smooth body. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.