癰よう疽そ

noun

serious skin eruption; carbuncle and deep-rooted ulcer

Refers collectively to severe skin lesions, specifically 癰 (carbuncle) and 疽 (deep-rooted ulcer). Used in traditional Chinese medicine and older medical texts; in modern Japanese, individual conditions are usually named separately.

See also: 癰 · 疽

• 漢かん方ぽうでは、癰よう疽そは体たい内ないの熱ねつ毒どくが原げん因いんとされる。

  In Kampo medicine, yoso is attributed to heat toxins within the body.