Sentence:  A Perſon of Honour, of a full Body abounding with ſharp Humours, was ſeized with an "Herpes" on his right Leg. ... [I]t inflamed and ſwelled very much, many <WSD>Wheals</WSD> aroſe, and fretted one into another, with great Excoriation. 
Meaning of the word marked with <WSD> tags:  A small raised swelling on the skin, often itchy, caused by a blow from a whip or an insect bite etc.