phlegmon of the floor of the mouth; Ludwig's angina
Medical term for a severe, rapidly spreading infection of the soft tissues in the floor of the mouth. Often referred to as Ludwig's angina in English medical contexts.
Ludwig's angina often requires early antibiotic administration and surgical drainage.
Compound of 口底 (floor of the mouth), 蜂窩織炎 (phlegmon/cellulitis). The term is a direct medical description; no further historical derivation is specified.