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Ankylosing Spondylitis & Onsen | Radioactive (Radon) Springs Specifically Indicated

Published May 6, 2026·1min read

Ankylosing spondylitis — chronic inflammation of the spine and sacroiliac joints — is specifically listed as a bathing indication for radioactive (radon) springs by Japan's Ministry of the Environment. Trace radon absorbed through skin and breathing exerts anti-inflammatory and immunomodulatory effects via low-dose radiation hormesis.

Applicable spring types
1 type

Ankylosing spondylitis causes chronic spinal and sacroiliac inflammation that can progress to spinal fusion. Trace radon (²²²Rn) in radioactive springs is absorbed through skin and respiration and is studied for anti-inflammatory hormesis effects at low radiation doses. European spa therapy research also supports radon baths for immune-mediated joint disease.

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Radioactive Springs: Traditional Radon Waters for Gout & Joint Conditions →

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