Need to add a roll command..
Being on fire is generally a most unfavorable way to go about exploring the dungeon. You suffer loss of 1-2 hp each second that you continue to be on fire for a total of 9hp total damage (confirmation needed).
The most common ways of being set on fire are: jumping onto a brazier, walking through a flame trap, or coming into contact with monsters or magic missiles that are already on fire.
Solutions[]
The least favorable solution is simply to wait for the fire to go out which takes around 5 seconds. However, the best thing to do is to look around for a handy waterfall that can be used to douse your flame.
Warning[]
Being on fire will continue to sap your hp, often without anything you can do to stop it - don't play with fire!
It is noteworthy that a fire will coninue to spread between mobs so it can be an effective way of killing groups of enemies with low health. Just be careful if you have a large number of summoned creatures as you may find yourself trapped within a blazing inferno of skeletons.