Extreme tiredness no energy excessive sleepiness no cause has been found bloods have come back normal memory problems sleep during the day.

Too common: Enigmatic hypersomnia (idiopathic) is seen in young women sometimes without clear cause. In the majority of the young ladies I have seen with this, the condition almost always improves within a few years. Worth seeing a doctor who specializes in sleep medicine nonetheless to make sure no other reason and to discuss treatment options.