Portrayal of the Physician Hua Da Scraping the Bone of Guan Yu to Treat an Arrow Wound (Hua Da hone o kezurite Guan Yu ya-kizu o ryoji suru zu), Utagawa Kuniyoshi, 1853

“Guan Yu was once injured in the left arm by a stray arrow which pierced through his arm. Although the wound healed, he still experienced pain in the bone whenever there was a heavy downpour. A physician told him, “The arrowhead had poison on it and the poison had seeped into the bone. The way to get rid of this problem is to cut open your arm and scrape away the poison in your bone.” Guan Yu then stretched out his arm and asked the physician to heal him. He then invited his subordinates to dine with him while the surgery was being performed. Blood flowed from his arm into a container below. Throughout the operation, Guan Yu feasted, consumed alcohol and chatted with his men as though nothing had happened.” (Wikipedia)