2 Approaches for Gout via Hot Spring Therapy
Gout occurs when uric acid crystals accumulate in joints. Hot spring therapy addresses it through two routes — bathing and drinking — using different spring types.
- Radon springs (bathing): Radon absorbed through the skin is thought to regulate the autonomic nervous system and exert anti-inflammatory effects. Famous examples include Misasa Onsen and Masutomi Onsen.
- Bicarbonate springs (drinking): Alkaline spring water raises urinary pH, increasing uric acid solubility and promoting renal excretion — also used in European drinking-cure traditions.
About radon springs
Radon springs contain ≥30 Mache units (111 Bq/L) of radon (²²²Rn) as defined by Japanese law. Low-dose radiation is proposed to trigger a hormesis effect that modulates inflammation and immunity, though this remains a subject of ongoing scientific debate.
Bicarbonate spring drinking and uric acid excretion
Bicarbonate ions (HCO₃⁻) in drinking spring water raise urinary pH. Uric acid is poorly soluble in acidic urine but becomes more soluble as pH increases, facilitating greater renal excretion of uric acid.
Related Onsen Facilities
Bicarbonate Spring
Awaiting analysis
References
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