Climatotherapy Psoriasis — SCE Dermatology MCQ
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Correct answer: C — Combined sun exposure (NB-UVB from natural sunlight) and salt water bathing reproduce elements of climatotherapy; Dead Sea climatotherapy has the strongest evidence — combining natural UV, mineral-rich water, and reduced atmospheric UV filtering at low altitude
The beneficial effect of seaside holidays on psoriasis is attributed to natural UV exposure (particularly UVB) combined with salt water bathing. Dead Sea climatotherapy has the strongest evidence — the Dead Sea's unique environment provides: increased natural UVB (specific wavelengths filtered by the thick atmosphere at 430m below sea level), mineral-rich water (magnesium, bromine), and high barometric pressure. Studies demonstrate PASI 75 in 40-80% of patients after 4-week Dead Sea climatotherapy courses. This natural therapeutic effect inspired the development of NB-UVB phototherapy and the combination of UVB + saltwater bathing (balneophototherapy). Climatotherapy is recognised by some European health insurance systems as a legitimate psoriasis treatment.
Reference: BAD 2020 Psoriasis; Dead Sea Climatotherapy Studies