If (or when) you are Cursed there are only a few options. By far the most convenient is to use a Purging Stone.
Where to get one
You can pick-up a Purging Stone in a few ways:
If you are Cursed, a statue like this will appear. If you are playing online, others will see this statue.
credit: From Software
- Removes Curse from the player.
Note about Curse