To treat (tissue or a patient) with diathermy; to apply therapeutic heat using electrical current or electromagnetic radiation.
From Greek 'dia-' (through) + 'thermē' (heat) + '-ize' (verb suffix meaning to treat or cause to become), developed in medical practice during the early 20th century.
When doctors diathermize an injured shoulder, they're essentially creating an internal heat source that causes the blood vessels to dilate and bring more healing nutrients to the damaged tissue—it's controlled inflammation as medicine.
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