carbuncle
疽 centers on a deep, localized skin infection: a carbuncle, which is a cluster of boils caused by bacterial infection.
疽 combines the sickness radical 疒 with the phonetic component 且, which likely contributed the sound and the idea of a deep-seated sore.
The sickness enclosure 疒 wraps around 且, like a deep, clustered infection hidden under the skin. Picture a painful carbuncle forming beneath the surface.
For ソ, imagine a sore carbuncle that needs to be soothed: sore -> ソ, and the sickness enclosure holds the painful sore.
anthrax
gangrene
whitlow; felon
gas gangrene
mythological growth (tumour) that takes the shape of a human face
Clostridium chauvoei (bacteria that causes blackleg)
anthrax
Bacillus anthracis (anthrax bacteria)
type of carbuncle
swelling; boil
any serious skin eruption
cutaneous anthrax
pulmonary gangrene; gangrenous pneumonia
inhalation anthrax
gastrointestinal anthrax
gangrene
anthrax
intestinal anthrax
glanders (contagious disease of horses)
caries