الفَصْد
A bloodletting method distinct from cupping, discussed by Ibn al-Qayyim as the other major form of therapeutic bloodletting recognized in classical medicine — a commentary topic rather than a Prophetic instruction.
No hadith text — commentary-only entry
Unlike most entries on this site, fasd doesn't have a direct Prophetic narration behind it. It's discussed here because Ibn al-Qayyim covers it in Zad al-Ma'ad alongside cupping (hijama) as one of two recognized bloodletting methods in the classical medical tradition — but the source for this entry is his own medical commentary, not a hadith attributed to the Prophet ﷺ.
Ibn al-Qayyim discusses fasd alongside hijama (cupping) as the two recognized bloodletting methods in the classical medical tradition he draws on, noting differences in when each was considered appropriate — but only cupping carries direct Prophetic narrations, which is why it has its own separate entry on this site. He describes fasd as drawing blood directly from a vein (as opposed to cupping's more superficial, skin-surface method), generally reserved in the classical framework for conditions thought to involve deeper or more widespread excess blood, while cupping was used for more localized complaints.
Therapeutic venesection (phlebotomy) still exists in modern medicine, but only for a narrow set of specific, diagnosed conditions (such as hemochromatosis or polycythemia) under clinical supervision — not as a general treatment for the broad range of ailments the historical humoral framework applied it to.