Galen's theory that if you had too much of a humour, you needed to cure it with the opposite, e.g. too much phlegm (cold and wet) needed something spicy (hot and dry)
In the 14th Century, astrology (the study of the movement of stars and planets) was key part of medical training and physicians used planetary movements and zodiac signs in their treatment
Physicians believed the stars and planets affected your health and caused disease, for example the movement of Saturn and Jupiter was to blame from the Black Death
Blood letting β The most common way to remove bad humours/blood. It included: Cupping - Putting warmed cups onto open cuts to draw out blood into the cup, Leeching β Using leeches to suck out bad blood
Medieval surgeons could do some complex external surgery, from removing eye cataracts or trepanning β the drilling of a hole into the skull to remove demons
In a time of frequent war, surgeons' skills were much in demand and as a result their skills increased β Prince Henry V was saved by his surgeon John Bradmore