Which wounds bleed?

[Varyon]

The way I'd rule it, for gritty realism, is that any Major Wound bleeds internally, requiring Surgery (or natural recovery, which a good physician can assist with). Non-major cutting, piercing, and impaling wounds all bleed externally. Toxic damage can only cause internal bleeding (that is, on a Major Wound). Burning, corrosion, and crushing are a bit of an oddity here; while I would normally go with no bleeding, reduced bleeding (like gilbertocarlos' suggestion) may indeed be more appropriate.

EDIT: It should be noted that face/skull wounds bleed far worse than they really should. I think HT and/or MA has these wounds bleed at a greater frequency, although I'm not certain. Regardless, damage that gets to the skull (that is, gets past any armor) but doesn't bypass its DR probably should still cause bleeding.