Before I was diagnosed with Bipolar Disorder I definitely had problems regarding money. Very impulsive, buying and paying for stuff with checks without bothering to worry what the balance was!!
Most lists of common symptoms for Bipolar Disorder will list overspending, over gambling, impulse shopping etc as as ONE of the symptoms.
Truthfully, if there are family or friends who are willing an untreated Bipolar (or one who is not yet stabilized on medication) would probably be better off financially having someone else handle their money until there is a more permanent "plateau" between manic and depressed....
And welcome to the Boards!!