Editing The Canon of Medicine (section)

==Book 4 Special Diseases Involving More Than One Member==
Book 4 covers diseases that affect the whole body such as fevers or poisons, or conditions that could happen to any part of it such as wounds or bone fractures.<ref name=":4">{{Cite web|url=http://www.iranicaonline.org/articles/avicenna-x|title=AVICENNA x. Medicine and Biology|last=Musallam|first=B.|website=Encyclopædia Iranica|access-date=10 November 2019|archive-date=1 December 2019|archive-url=https://web.archive.org/web/20191201044959/http://www.iranicaonline.org/articles/avicenna-x|url-status=live}}</ref> The book "concludes with a treatise on personal hygiene, emphasizing care of the hair, skin, nails, body odor, and the treatment of overweight or underweight persons."<ref name=":4" />

In Book 4 – as with other ancient Islamic medical writings – large sections were devoted to covering fevers in great detail.<ref name=":03"/> Several types of fevers were distinguished, partly based on the location of the factors causing each specific illness:<ref name=":03"/>

1.    Ephemeral (involving the [[pneuma]])

2.    Putrid ([[putrefaction]] of humoral residues)

3.    Hectic (occurring in a major organ)

Each of these classifications were further subdivided: for example, Avicenna also listed 23 different types of ephemeral fevers in Book 4 of the ''Canon of Medicine.''<ref name=":03"/>