Dreaming about a hag means disease and death. A hag or old woman can beckon them to visits their ancestors and through those journeys, reconciling themselves with their past and accepting mortality.
Also, the possible meanings of hag in a dream: it is most likely a woman’s feelings on circumstances where she feels powerless – never knowing what to do and when to act and also giving up the fight.
Using this understanding, we can interpret a hag as a representative of old age, wisdom and death because these are all actual representations of an old hag in dreams.