Guild Wars 2

1?What’s the difference between burning and bleeding
2?Why chilled can not stack?

In particular the necromancer, chilled can cause harm, but does not stack? The necromancer almost no chance

http://wiki.guildwars2.com/wiki/Bleeding

http://wiki.guildwars2.com/wiki/Burning

The difference is how the damage is calculated.

2: Chilled does stack.