What is that red smoke that comes out of darth maul

I was wondering this because it doesn't look that much like blood because it looks like smoke if you rewatch the scene not splashing blood and dosent a lightsaber cut cauterise the wound which is why there isn't usual y much blood in starwars. ,?

I was wondering this because it doesn't look that much like blood because it looks like smoke if you rewatch the scene not splashing blood and dosent a lightsaber cut cauterise the wound which is why there isn't usual y much blood in starwars. ,?