What Causes Black And Blue Rashes On The Body After A Stroke?

my sister had a stroke, then she had another stroke within a month, she need surger,y her caroid atery was completely block... so the went in and put stents... she was on a blood thinner... they rushed her to the hospital from the nursing home because she was bleeding under the skin.. she had all these big patches of black and blue patch all over her... what do you think the outcome will be... i feel she won t make it...