Talk:Known Bugs (Console)/@comment-71.252.248.174-20130412102831/@comment-7700568-20130412164518

You don't. You can always try digging a hole right in the edge of the hallow/corruption and filling it with something that doesn't get hallowed or corrupted, like Wood, though it gives a lot of work. It is easier to let it spread, and you can always farm Souls more easily. Just watch out for the surface hallow/corruption as they can be stopped, or slowed.