Why did doctors drain blood for thousands of years to treat illness?

Why was bloodletting so popular? - Stephanie Honchell Smith · 6:33 · Video: TED-Ed · Watch at the source

In short: Bloodletting was a standard medical treatment from ancient Greece through the 19th century. This video examines why the practice remained popular for so long despite its clear shortcomings in treating patients.

The practice of bloodletting was rooted in the medical theories of figures like Hippocrates, who proposed that human health depended on maintaining a proper balance of bodily fluids. When this equilibrium was disrupted, physicians believed that removing blood could help restore the body to its natural, healthy state.

While the practice persisted for millennia, it eventually fell out of favor as medical understanding evolved. This exploration traces the longevity of the procedure and the historical context that allowed it to remain a pervasive medical intervention for such an extensive period.

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