I had a cortizone inj a week ago in mt left knee (one of hundreds). Yes it bled profusly ( but has happened before, so i wasnt worried). Since then though at first at the injectoin site it had an approx 1 x 1 scap as though i skinned my knee. A week later i know have several scabs all ove my my knee ( which are quite painful. I just moved to this state and am very apprehenside and scared after having 13 knee surgies. Thank you.