What is a stroke, and why is it no longer just a condition affecting older people?
Stroke remains one of the leading causes of death and long-term disability worldwide. It has traditionally been associated with older age groups, with an average onset age of over 70. However, this trend is shifting.
Recent research shows that between 5% and 15% of stroke cases in high-income countries occur in people under the age of 55, with the figure reaching up to 24% in lower-income countries.
Perhaps most concerning is the rise in stroke incidence among younger adults since the early 21st century, in contrast to the overall decline observed in older age groups.
The figures are striking: from approximately 11 cases per 100,000 young people per year, rates have increased to around 21. This represents an increase of up to 90%. Although stroke is still relatively uncommon under the age of 55, the upward trend is clear.
Why are stroke cases increasing among younger adults?
Experts point to a combination of factors:
- A rise in traditional risk factors.
- New and emerging risks linked to lifestyle and environment.
- Broader social and healthcare changes worldwide.
Even so, there is no single clear cause. It is likely the result of a complex interplay of factors.
Stroke symptoms in younger adults: how to recognise them in time
The symptoms are the same as in older adults and require immediate medical attention:
- Sudden weakness in the face, arm or leg.
- Difficulty speaking or understanding speech.
- Loss of vision.
- Dizziness or loss of balance.
Recognising these signs quickly can save lives and reduce the risk of long-term disability.
Risk factors: what increases the likelihood of having a stroke before the age of 55?
Contrary to previous assumptions, traditional risk factors also play a very significant role in younger adults. In fact, they may be responsible for up to 90% of cases.
The most important are:
- High blood pressure (which accounts for nearly half of the overall risk)
- Sedentary lifestyle
- Smoking
- Obesity
- Diabetes
- High cholesterol
Recent studies indicate that almost half of young adults who suffer a stroke are smokers, and more than 40% have high blood pressure. Moreover, it is becoming increasingly common for these factors to occur together, with up to 40% of younger patients presenting three or more at once.
The challenge is that these risk factors are often underdiagnosed or poorly managed in younger individuals.
Emerging risk factors: stress, pollution and lifestyle
One of the most significant findings is the increasing incidence of strokes among patients who do not present traditional risk factors. This has drawn attention to a number of emerging risks:
- Air pollution
- Long working hours
- Chronic stress
- Sedentary lifestyle
- Autoimmune diseases
- Depression
- Drug use
Some studies suggest that air pollution may have a particularly significant impact on people under the age of 55.
What are the differences between stroke in younger and older people?
One of the most distinctive causes of stroke in younger people is dissection of the arteries in the neck, such as the carotid or vertebral arteries. This can account for up to one in five cases. Unlike in older adults, this type of stroke can occur without the usual risk factors and is often preceded by headache or neck pain in the days before the event, sometimes following minor trauma or intense physical activity.
There are also other important differences between the two groups. In younger people, stroke is more likely to occur without a clear cause, with social and environmental factors playing a greater role than in older populations. In lower-income countries there is a higher proportion of haemorrhagic strokes and an overall higher incidence of stroke—almost twice that seen in more developed countries.
Consequences of stroke at a young age: impact on health and quality of life
The impact of stroke in younger people can be particularly significant, as it often occurs during active stages of life. This can have a profound effect on family life, with consequences that may last for many years.
Some key figures:
- Up to 32% of younger patients die or are left with a disability within three months.
- 44% experience long-term cognitive difficulties.
- There is an increased risk of developing epilepsy later in life.
- Some patients are unable to return to work.
In addition:
- The risk of a recurrent stroke may reach 16-19% over 15 years.
- The long-term risk of death is up to four times higher than in the general population.
- Anxiety and depression affect up to 30-40% of patients.
Can stroke be prevented? Key habits to reduce the risk
Yes, and there is considerable scope for action. The most effective measures include:
- Keeping blood pressure under control
- Engage in regular physical activity
- Avoid smoking
- Maintaining a healthy weight
- Managing diabetes and cholesterol levels
- Reducing stress
Healthcare professionals also stress the importance of improving early diagnosis in younger adults, as they are often not considered to be at risk.
Why do experts warn of a global increase in the coming years?
The projections are clear:
- In 2021, almost 2.8 million young adults worldwide experienced a stroke.
- 89% of cases occur in lower-income countries.
- Incidence is expected to rise by up to 12% over the coming decades.
- In the United States, for example, prevalence among young adults could triple by 2050.
An urgent public health challenge
The rise in stroke among younger adults has become a global challenge that extends beyond the healthcare sector, with far-reaching economic and social implications.
In this context, experts highlight the need to develop better tools for predicting risk at younger ages, to deepen research into emerging risk factors, and to implement prevention strategies adapted to different contexts. All of this must go hand in hand with stronger public awareness.
The idea that stroke is a condition that only affects older people no longer reflects reality. Understanding this shift and acting early will be key to reducing its impact in the years ahead.
Information documented by:
Dr Xabier Urra, Head of the Neurology Department at Hospital Clínic Barcelona.
Bibliography:
- 2026. The rising incidence of stroke in the young: Epidemiology, causes and global impact. https://pubmed.ncbi.nlm.nih.gov/40682212/
- 2021. Global Burden and Risk Factors of Stroke in Young Adults, 1990 to 2021: A Systematic Analysis of the Global Burden of Disease Study 2021. https://pubmed.ncbi.nlm.nih.gov/40371619/
