Bloodletting
Bloodletting or Bleeding was an medical procedure in which blood was deliberately released from a patient in the belief that it would cure an ailment.

In 2376, Abarca, a Qomar disdainful of the "primitive" technology of the , asked The Doctor whether his program included bloodletting. The Doctor replied that it didn't, but that he'd be "happy to add it to [his] repertoire." ()

Kelis' people, a Bronze Age civilization, practiced bloodletting, which they believe released fever. ()

de:Aderlass
Medical procedures