Medical treatment using extreme cold or freezing to cure diseases, reduce inflammation, or numb pain.
From Greek 'kryos' (cold) + 'therapeia' (healing or treatment). This medical term developed in the 20th century as doctors scientifically explored how controlled freezing could be therapeutic.
Modern athletes use ice baths after intense workouts because of this principle—but doctors take it way further, using liquid nitrogen to freeze off warts, tumors, and damaged tissue. Cold as medicine is actually ancient, but cryotherapy made it scientific.
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