Do you require someone else's blood to heal this?

[She's simply got to be blunt about it; there's really no time for anything else. Shucking off her top layer of robes, she moves up to his head and lifts it unceremoniously, just long enough to shove the cloth underneath it as a makeshift pillow.]

Also. I have a steel needle and a silver one. If I suture this, which will pierce better to make the stitches?