Summary: Temperature and barometric pressure show strong associations with cold pain tolerance and pressure pain tolerance, according to a new population-based study.
Source: Wolters Kluwer Health
Do weather conditions influence pain from conditions such as arthritis or migraine? What once sounded like folklore appears to have measurable effects: on standard quantitative sensory tests, several weather-related factors alter pain tolerance, a new study published in PAIN reports.
Led by Erlend Hoftun Farbu, a PhD student at UiT – The Arctic University of Norway in Tromsø, the research suggests that “weather has a causal, non-linear, dynamic effect on pain tolerance.” The underlying reasons remain uncertain: the link could reflect physiological changes, psychological influences, or both.
Weather affects two common pain tests
The analysis used data from the Tromsø Study, a large, ongoing health study in Tromsø, Northern Norway, above the Arctic Circle. Roughly 19,500 participants with a mean age of 57 underwent two widely used quantitative sensory tests to measure pain tolerance.
Pressure pain tolerance (PPT) was assessed with cuff algometry: steadily increasing pressure was applied to the lower leg until participants reached their tolerance limit. Cold pain tolerance (CPT) was measured with a cold pressor test, recording how long subjects could keep their hand immersed in cold water.
Researchers compared pain tolerance measurements with contemporaneous meteorological data — including temperature, barometric pressure, precipitation, relative humidity, and wind speed — and examined both seasonal patterns and shorter-term fluctuations.
PPT showed no clear seasonal pattern across the full study period and did not correlate strongly with weather variables when averaged over long intervals. However, closer inspection revealed time-dependent relationships: short-term variability in PPT was non-random and occurred on a timescale that mirrored weather fluctuations. Notably, temperature and barometric pressure also predicted future PPT values in time-series analyses.
By contrast, CPT demonstrated a distinct seasonal effect. Participants tolerated cold-induced pain longer during colder months, and withdrawal rates from the cold pressor test were substantially higher in warmer months compared with January. This seasonal pattern aligns with established research on cold adaptation: regular exposure to cold appears to increase cold tolerance.
The investigators noted that temperature and barometric pressure were the meteorological factors most consistently associated with CPT and PPT. They also emphasized that temperature effects are likely modified by humidity and wind, since these factors change the rate of heat loss and can alter perceived cold stress.
Many people who live with chronic pain report that weather affects their symptoms. Prior studies have produced mixed results: some identify links between specific weather variables and pain, while others find weak or inconsistent associations. The current study offers an explanation for these conflicting findings: if weather effects on pain tolerance are dynamic, non-linear, and change over short timescales, averaging measurements across long periods can obscure real relationships.
“If an effect is changing over time and you average it, you might end up concluding there is no effect,” Farbu and colleagues note. The observed short-term fluctuations, particularly for PPT with an intrinsic timescale of several days, match the temporal patterns seen in meteorological variables, supporting the idea of a mechanistic connection.
The authors propose several possible mechanisms. One possibility involves central nervous system processes: weather-related factors might influence brain regions responsible for pain perception and modulation. Another hypothesis is psychological: seasonal mood changes, such as those seen in seasonal affective disorder, could alter endurance and pain reporting. The research team concludes that no single mechanism is likely to explain all observed variation; instead, multiple interacting and possibly opposing processes are probably involved.
About this pain research news
Author: Connie Hughes
Source: Wolters Kluwer Health
Contact: Connie Hughes – Wolters Kluwer Health
Image: The image is in the public domain
Original Research: Closed access. “To tolerate weather and to tolerate pain two sides of the same coin? The Tromsø Study 7” by Farbu, Erlend Hoftun et al. Pain
Abstract
To tolerate weather and to tolerate pain — two sides of the same coin? The Tromsø Study 7
Belief in a weather–pain connection is widespread. To test this idea, researchers analyzed data from more than 18,000 adults aged 40 and older who participated in Tromsø Study 7. Each participant completed a single assessment of pressure pain tolerance (PPT) using cuff algometry and cold pain tolerance (CPT) using the cold pressor test.
The study found a clear seasonal pattern in CPT: participants withdrew from the cold pressor test far more often during warmer months, with withdrawal rates up to 75% higher compared with the coldest month analyzed. PPT did not show a clear seasonal cycle when averaged over the study period, but PPT exhibited nonrandom short-term variation with an intrinsic timescale of about 5 days, similar to the observed timescales of weather variables.
Both PPT and CPT correlated with meteorological measurements, and those correlations varied over time. Temperature and barometric pressure also served as predictors of future PPT values. Together, these observations support the view that weather exerts a causal, dynamic influence on pain tolerance and help explain why previous studies have sometimes reported inconsistent results.
In summary, the authors emphasize that multiple interacting mechanisms—physiological, psychological, and environmental—are likely responsible for the observed associations between weather and pain tolerance. Future pain research and study design should account for seasonal and short-term meteorological variation when interpreting experimental and clinical findings.