Does Chronic Pain Harm Your Brain?

There is bad news for pain sufferers. Several large, long-term studies have found a connection between long-term pain and dementia.

The association was even stronger for people who have:

• Pain in several parts of the body
• Pain that significantly interferes with everyday life
• Headache pain
• Depression
• Older age

Chronic pain (pain that lasts longer than three months) is extremely common. In 2021, an estimated 51 million adults in the United States suffered chronic pain, with about 17 million having high-impact chronic pain that greatly restricts daily activities.

Arthritis, back problems, nerve injury, migraine, accidents, and illnesses can cause pain that does not go away. 

Over time, persistent, chronic pain becomes a health problem of its own, inflaming the nervous system, and putting the body into a state of stress that makes it more sensitive to pain. Sleep problems, less mobility, worsening of mood and concentration, and social isolation often follow, lowering quality of life. 

Anyone in pain can have temporary problems with concentration or memory, but exposure to pain over long periods of time seems to negatively affect brain health. 

Chronic Pain May Increase the Risk of Dementia

A 2026 meta-analysis (a study of many other studies) combined 28 longitudinal studies (studies that followed people for many years). Nearly 7.9 million people were tracked over time. Researchers found that chronic pain was associated with a 43% higher odds of developing dementia compared with not having chronic pain. The association was stronger when participants were followed for at least five years, as dementia takes many years to develop.

Chronic Pain is Common in Older Adults 

A 2017 study published in JAMA Internal Medicine followed 10,065 Americans aged 62 and older. Those with persistent pain had faster memory decline as time went on than those without persistent pain.

Over 10 years, the researchers estimated that persistent pain was associated with an additional 2.2 percentage point increase in the probability of developing dementia. For an individual, the increase was not large. But at the the population level, it is meaningful. Participants were considered to have persistent pain if they reported moderate or severe pain at two assessments two years apart. 

Pain in Many Areas 

In a UK study of about 356,000 participants, the number of painful areas of the body was correlated to future dementia risk. Over a decade long follow-up, nearly 5,000 participants developed dementia.

For every additional location in which a person reported chronic pain, the risk of all-cause dementia increased by about 8%, while the risk of Alzheimer’s disease (the most common form of dementia) increased by about 9%. The correlation held even after researchers adjusted for numerous other factors, including physical activity, sleep, psychological problems, medical conditions, and medications used for pain. 

A 2025 study of 3,459 older adults found that people with chronic pain in several locations experienced faster declines in global cognition, episodic memory, and working memory. They were also more likely to develop Alzheimer’s. 

Those with pain at only one location did not have significantly greater cognitive decline or dementia risk than people without chronic pain. 

Post-mortem examination of brains revealed that people who had multiple body sites of chronic pain had greater amyloid-beta accumulation in brain regions important to memory, especially among people carrying the APOE-e4 genetic variant, which increases susceptibility to Alzheimer’s disease. 

Chronic Pain and Brain Health 

Chronic pain frequently occurs alongside depression, sleep problems, reduced physical activity, and other medical conditions that themselves can impair cognitive health. 

However, how brain affects brain health is not fully understood.

Persistent pain continuously engages brain systems involved in attention, emotion, and stress. Inflammation and long-term changes in neurological pathways involved in processing pain may contribute to cognitive decline, although these mechanisms have not yet been established as causes of dementia.

It may be that social isolation, an important risk factor for dementia, influences dementia risk in pain patents more than the amount of pain. In other words, pain interference in everyday activities might be more impactful on brain health than pain intensity. 

Association is not Causation 

It is important to remember that these studies are observational and do not demonstrate that chronic pain causes dementia.

People with chronic pain differ from people without chronic pain in many ways aside from their pain experience. It could be that other factors that beset pain sufferers besides pain create susceptibility to dementia. 

People with pain may have different rates of cardiovascular disease, depression, sleep problems, physical inactivity, and medication use. Researchers attempt to account for these differences statistically, but it is impossible to eliminate every potential explanation. 

On the other hand, it could be that very early brain changes preceding dementia influence pain perception and behavior. Perhaps those more predisposed to developing chronic pain might also be predisposed to developing cognitive decline. Also, pain medications like opioids and gabapentin have been implicated as risk factors for dementia as well. 

Treat Pain to Reduce Dementia Risk

Persistent and widespread pain deserves attention not only because of its effect on daily life and its societal cost, but also because it may identify people at greater risk for cognitive decline.

Chronic pain is usually treated with a combination of approaches rather than a single medication or procedure. Chronic pain, especially the high-impact kind, can be impossible to relieve fully.  The overall goal is typically to reduce pain enough to improve movement, sleep, socializing, and everyday functioning.