The Dietary Almanac, widely circulated by Byzantines, divides the four seasons of the year into four stages: wet, hot and cold, and lists in detail the foods that are suitable for eating and taboo. They believe that diseases are the result of various factors and disorders in the human body, so the key to treating diseases lies in conditioning. The best way to treat a disease is to rest, keep warm and sweat. Health preservation should be more important than treating a disease. In Byzantium, people highly admire some folk earthwork, such as regulating the liver and spleen with pepper, removing bad breath with grass, bleeding three times a year in spring, summer and autumn, treating sprains with massage, stopping bleeding with burning, purifying the air with mugwort leaves and so on. China's ancient history books also recorded that Byzantine surgeons "treated eye dysentery well, or saw the disease before it, or opened their brains to get rid of worms".

12 century Sicilian church mosaic-Christ cured the lame and blind.