A lucid dream is an unusual dream in which the dreamer becomes aware that they are dreaming. And with a bit of luck they can alter the dream's outcome. Unless they get excited at the fact they are having a lucid dream and they wake up. Or they suffer a false awakening and forget they are still asleep. It happens.
There are many reasons to attempt to have lucid dreams. The treatment of nightmares is an obvious one. But you could also use this dream state to overcome various phobias, theoretically. I've never tried it. But let me know if it works.
