Salt will work for small wounds, it works by dehydrating the hell out of bacteria, but it'll also do the same for your exposed flesh- causing pain in the process. For big wounds- like a large burn- it can put your body into shock and kill you, so take that into consideration. If the amount of salt you use would be too much for you to stand putting in your mouth, it's way too much.
Now, if you think salt is painful, sugar is much, much worse. Sugar doesn't attract white blood cells, whoever told you that is full of it. If you go with the sugar route, you'll need some friends to hold you down as you're screaming because the sugar that you packed your wound with, needs to be scrubbed out as much as possible. This is because sugar really only has two stages:
stage 1- sugar will dehydrate bacteria and surrounding flesh in pretty much the same ways as salt.
stage 2- sugar becomes food for surrounding flesh and bacteria.
Now the flesh can rebuild, which is the sole advantage that it has over salt, but since the bacteria get to snack out too, it needs to be taken out, hence the painful scrubbing while you're held down screaming process. Since your flesh is connected to you, it'll stick around mostly, and the bacteria will be removed, mostly. If you left the sugar in there, it will get severely infected and without quick medical intervention (think blood tranfusion with IV drip) you will die... well the speed of death does depend on the severity of the wound. Oh, and you need to scrub out/pack in 8 times a day, so every 3 hours. You might get a sore throat after a few days because of all the screaming you'll do.
This is why the sugar technique isn't used except in times of warfare or civil unrest. So the point of this is, don't use sugar, it's okay to use a little salt, and if you're uncertain, go school yourself some in some biological sciences and medical techniques and traditions.