Barometric Pressure & Arthritis Pain

Many arthritis sufferers perceive a relationship between weather and joint pain, although medical science has not reached a consensus.

Barometric Pressure

• Barometric or atmospheric pressure is, simplistically, the weight of the overlying column of air over a given area. It varies based on factors like temperature and density.

One Theory

• Some believe that decreased barometric pressure causes tissue expansion. This could exacerbate existing swelling and increase joint discomfort.

Empirical Research

• Research has shown varying results when considering the possible relationship. A 2007 study from Tokyo, reporting on five years of data, found seasonal variation in rheumatoid arthritis, but this fluctuation was not tied to varying barometric pressure or other weather factors. Another study from the same year, tracking sufferers of knee osteoarthritis in the U.S., showed a correlation between atmospheric pressure shifts and severity of pain.

Rats

• A 2003 study from Japan seemed to demonstrate a relationship between lower pressure and lower temperature on joint pain in rats.

Complications

• Some scientists and medical professionals still aren't convinced. It may be that the unsettled weather associated with low pressure lowers people's moods and keeps them from exercising, both of which may enhance perception of arthritic pain. A study looking at arthritis patients' beliefs concerning weather effects on their pain suggested that psychology, not the atmosphere, may be the cause; people may "blame" bad weather for discomfort.