The evolution of mental healing reached its sophisticated peak during the Joseon Dynasty, particularly with the 17th-century masterpiece, the Dongui Bogam. The physician Heo Jun documented extensive treatments for Hwa-byung (fire-illness), a unique Korean psychosomatic disorder caused by suppressed emotions. The primary herbal strategy involved "cooling the fire" of the heart. Formulas such as Cheongsimhwan (Clear Heart Pill), containing a complex blend of herbs including wild ginseng and dried ginger, were used to treat palpitations and emotional instability.