There were limited knowledge and had no adequate health care systems.
Cures from Medieval England:
For Toothache: Take a candle and burn it close to the tooth. This will stop worms from gnawing teeth. For general illness: People were told that a pilgrimage to a holy shrine to show your love of God would cure them of illnesses. Blood letting:This was when blood was drained from a certain spot in your body. For evil spirits in the head: Surgeons used trepanning . This was where a surgeon cut a hole into the skull to release evil spirits trapped in the brain. The operation might also include cutting out the part of the brain that had been ‘infected’ with these evil spirits.
There were limited number of doctors in Medieval time and because of Catholic religion, they weren't allow to study dead corpses. If a person was not rich enough, they had to suffer from treatments that did not work or made the illness worse.
Most common treatments were meditation, prayer, pilgrimages, leech, blood letting, humours and use of herbs.
There were many myths and superstitions about health and hygiene. People believed, for example, that disease was spread by bad odors. It was also assumed that diseases of the body resulted from sins of the soul. When Black Death destroyed Europe, many people believed that God was angry and it was the punishment for humans.