#bloodletting  formerly used as a treatment to reduce excess blood (one of the four humors of medieval medicine)
  supertype:  #medical_care__medicalcare__medical_aid__medicalaid  professional treatment for illness or injury
  subtype:  #venesection__phlebotomy  surgical incision into a vein; used to treat hemochromatosis
  subtype:  #cupping  a treatment in which evacuated cups are applied to the skin to draw blood through the surface

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