Why was the plague called the "Black Death"? What were some of the common symptoms?

It was called The Black Death due to lymph nodes that became blackened and swollen after bacteria entered through the skin.

Symptoms are:

Fever and chills, Extreme weakness, Abdominal pain, diarrhea and vomiting, Bleeding from your mouth, nose or rectum, or under your skin, Shock, and Blackening and death of tissue (gangrene) in your extremities, most commonly your fingers, toes and nose.

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