To make a man bleed is to make him pay dearly for something; to
victimise him. Money is the life-blood of commerce.
It makes my heart bleed.
It makes me very sorrowful.
She found them indeed,
But it made her heart bleed.
Bleeding of a Dead Body
(The). It was at one time believed that, at the approach of
a murderer, the blood of the murdered body gushed out. If in a dead
body the slightest change was observable in the eyes, mouth, feet, or
hands, the murderer was supposed to be present. The notion still
survives in some places.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894