autosangrarse

A rare, mostly clinical or historical term for deliberately causing oneself to bleed — either in the historical medical sense of self-administered bloodletting, or, more gravely, as a form of self-harm. Rare in everyday speech; treat with the same care as autolesionarse when the self-harm sense applies.

• En la medicina antigua, algunos practicantes se autosangraban creyendo que curaba las fiebres. — In ancient medicine, some practitioners bled themselves believing it cured fevers.
• Los médicos advierten contra intentar autosangrarse sin supervisión clínica. — Doctors warn against attempting to bleed oneself without clinical supervision.
• El texto histórico describe cómo el monje se autosangraba como penitencia. — The historical text describes how the monk bled himself as penance.

Not a casual or common word — it shows up mainly in historical/medical texts or clinical discussions of self-harm, never in ordinary conversation.

Often confused with autolesionarse.