Hwelca, hwylca
Bosworth & Toller Anglo-Saxon Old English Dictionary - hwelca, hwylca
According to the Old English Dictionary:
an;
- hwelca, hwylca
- m. An inflamed swelling, a pustule :-- Cwydele vel hwylca varix, Wrt. Voc. i. 45, 32. [Prompt. Parv. whelke, soore pustula : Wck. whelk pustula: Chauc. whelkes white (on a 'fyr-reed face'), D. D. whelk, whilk sty, pimple.]