What is the meaning behind the reference to yellow, black bile, phlegm, and their variations in strength in certain months in Tibb Al Rida, the book attributed to our 8th Imam Raza (as)? | Ask A Question | Al-Islam.org

Phlegm Islamic medicine Imam Ali al-Rida

What is the meaning behind the reference to yellow, black bile, phlegm, and their variations in strength in certain months in Tibb Al Rida, the book attributed to our 8th Imam Raza (as)?

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	Zoheir Ali Esmail, Shaykh Zoheir Ali Esmail has a Bsc in Accounting and Finance from the LSE in London, and an MA in Islamic Studies from Middlesex University. He studied Arabic at Damascus University and holds a PhD from the University of Exeter in the philosophical and mystical readings of Mulla Sadra in the context of the schools of Tehran and Qum. 374 Questions Answered	Ask
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Amina Inloes, Amina Inloes is originally from the US and has a PhD in Islamic Studies from the University of Exeter on Shi'a hadith. She is the program leader for the MA Islamic Studies program at the... Answered 1 year ago

This is a reference to the premodern medical theory of the four humours, which dates back to Aristotle. The idea behind this is that an imbalance in the four humours could lead to being unwell or different types of temperament.

As for variances between the seasons, I think this originates in a couple pre-existing models (which are not necessarily separate); that is to say, the text interacts with the ideas of the time and does not present something new. One is that, in traditional Chinese medicine, there are different recommendations for different times of the year. A somewhat less complex system is found in some countries (for instance, "hot" and "cold" foods), but I suspect it may simply be an idea that spread regionally and that is referenced here. The other is that, in the premodern era, medicine was often tied to astrology, and monthly recommendations can also be seen in this light.

May Allah always grant you good health!