wound, boil, syphilis
瘡 centers on visible skin afflictions: a wound, a boil, or the sores of syphilis. The common thread is a painful, often infected, lesion on the body.
瘡 combines the sickness radical 疒 with 倉, which likely provides the sound. The character originally referred to skin sores or boils.
The sickness enclosure 疒 wraps around 倉, like a warehouse of illness on the skin. Picture a painful boil or wound stored up inside the body, breaking out as a visible sore.
For ソウ, imagine a sore wound being sewn up: sew -> ソウ, and the sickness enclosure 疒 holds the painful boil that needs stitching.
scab; crust
pustule; scab
eczema
chickenpox; chicken pox; varicella
smallpox; variola
acne
mythological growth (tumour) that takes the shape of a human face
chilblains; frostbite
syphilis
pemphigus
acne vulgaris; acne
lupus vulgaris
syphilis
sycosis; hair follicle inflammation; barber's itch
lupus
smallpox demon; smallpox devil; deity to whom one prays for immunity to smallpox
smallpox; variola
person with a skin disease (esp. syphilis); syphilitic patient
person with skin disease (esp. syphilis)
syphilis