Dictionary.net

• is distinguished by pimples in clusters or patches, surrounded by a red halo; the cuticle growing gradually harsh, thickened, and chappy, often preceded by general irritation. In addition to antiphlogistics, a cooling ointment may be used, to allay itching.

1846 - Medical lexicon: a dictionary of medical science
By Robley Dunglison

• a severe form of eczema.

1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland