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People with long-term health problems such as arthritis are more likely to feel pain on humid days, a study has suggested.
Axar.az reports citing BBC.
Folklore suggests the cold makes pain worse - but there is actually little research into the weather's effects.
And this University of Manchester study of 2,500 people, which collected data via smartphones, found symptoms were actually worse on warmer, damper days.
Researchers hope the findings will steer future research into why that is.
Hearing someone say their knee is playing up because of the weather is pretty common - usually because of the cold, Some say they can even predict the weather based on how their joints feel.
But carrying out scientific research into how different types of weather affect pain has been difficult. Previous studies have been small, or short-term.
In this research, called Cloudy with a Chance of Pain, scientists recruited 2,500 people with arthritis, fibromyalgia, migraine and neuropathic pain from across the UK.
They recorded pain symptoms each day, for between one and 15 months, while their phones recorded the weather where they were.
Damp and windy days with low pressure increased the chances of experiencing more pain than normal by about 20%.
So if someone's chances of a painful day with average weather were five in 100, they would increase to six in 100 on a damp and windy day.
Cold, damp days also made pain worse.
But there was no association with temperature alone, or rainfall.
2019.10.27 / 16:19