To dream of menstruation or being on your period represents a problem or life situation that requires your full attention. Something you have to attend to, or a problem that can't be ignored.
To dream of your period ending represents feelings that requiring attentive care or undivided attention to a particular waking life situation is no longer important. Feeling "in the clear" or that problem requiring a timeout is over.
Dreams of menstruation are common for pregnant women or women about to have their periods because it reflects their feelings about these situations requiring care and undivided attention.
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