Discover 50 Super Weird Historical Facts 2 years ago Prev Article Next Article Prev43 of 51NextUse your ← → (arrow) keys to browse Fact 42: In the 19th century, doctors commonly used leeches for medical purposes, believing that the bloodletting could balance the body’s humors and treat various ailments. Prev43 of 51NextUse your ← → (arrow) keys to browse Facebook Prev Article Next Article