For the purpose of this study, a disease flare was classified as, "either minor/localized flares (pain/swelling localized to one area with fatigue and stiffness) or major/generalized flares (generalized pain, hot burning joints, muscle spasm, fever, sweating, extreme fatigue and stiffness)."

The authors of the study, published in the journal, Rheumatology, found that, "Seventy per cent of people with AS felt they had a flare in any given week."

To read the study abstract click here.

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