Our expert says:
OK, at 20, she's no longer a child, though of course always a daughter. I'm not sure what you mean by "hyper", as if this behaviour occurs during crying spells, you're probably referring to agitation, rather than the sort of "hyper" behaviour seen in a manic episode. In ordinary bipolar disorder, mood swings are not so rapid as to change within a day. What she needs is to see a competent clinical psychologist or psychiatrist for a full and detailed assessment, after which a diagnosis can be made, and only then can one sensibly discuss possible treatment.
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