The Chaucer Review: An Indexed Bibliography (Vols. 1-30)

Braswell-Means, Laurel. "A New Look at an Old Patient: Chaucer's Summoner and Medieval Physiognomia." 25 (1991): 266-75.
Using medieval medical theory based on Aristotle, Galen, and Hippocrates, and medieval physiognomy, Chaucer constructs the Summoner's portrait so as to describe the Summoner's medical conditions. The Summoner is clearly unnaturally hot as both his description and his cures indicate. The combination of these two suggests that the Summoner is choleric, according to Galen and Avicenna. Chaucer sees the Summoner and the Pardoner as variations of the same humor character. The Summoner's disease is also associated with sexuality, and astrological details associate him with Mars. This combination suggests that the Summoner would experience his most difficult time of year in the spring. The Summoner's disease is incurable, except by the spiritual healing he would experience at the shrine of Thomas a Becket.