Since practices of incubation have been so well known for so long, they may have become somewhat domesticated in the range of evidence on ancient dreaming. I begin by recalling the obvious: taken as a whole, the phenomenon of incubation makes the point that dreams are intimately connected with the corporeal. The evidence from Epidaurus adds a few details to this general picture. One sees in the physical evidence a stark reminder that devotees went to Epidaurus with their flesh in mind as much as the divine: the holy site is literally littered with body parts, small effigies of various limbs and organs, which presumably stood in need of relief. Once asleep in Asclepius' temple, a patient received his or her cure not through fairy dust or a divine nod. The preserved textual records leave no room for doubt on the subject. The dream served primarily as a vehicle for the God to perform an invasive procedure and manipulate the patient's body parts. The extant stelae include harrowing accounts of sliced eyeballs, severed heads, cleaved chests, as well as the extraction of a spearhead from a jawbone, an eye socket, or a lung and the removal of bucketsfull of worms or pus. One fuller example will suffice:
Aristagora of Troezen. She had a tapeworm in her belly, and she slept in the Temple of Asclepius at Troezen and saw a dream. It seemed r=to her that the sons of the God, while He was not present but away in Epidaurus, cut off her head, but, being unable to put it back again, They sent a messenger to Asclepius asking Him to come. Meanwhile day breaks and the priest clearly sees her head cut off from the body. When night approached, Aristagora saw a vision. It seemed to her the God had come from Epidaurus and fastened her head onto her neck. Then He cut open her belly, took the tapeworm out and stitched her up again. And after that she became well.
Viscera and the Divine: Dreams as the Divinatory Bridge between the Corporeal and the Incorporeal by Peter Struck in “Magic in History: Prayer, Magic, and the Stars in the Ancient and Late Antique World” edited by Scott Noegel, Joel Walker, and Brannon Wheeler (p 126-7)