Is it possible to be bipolar and not even realize it

I know a girl who's the most ridiculous person I've ever met (that's not to say that all people diagnosed with bipolar are ridiculous) and she insists she's perfectly normal. She's been diagnosed as bipolar by 3...count 'em 3 different doctors and she insists that they're all wrong and that she doesn't have a problem.

quite often the bipolarity is not observed in childhood...

And u feel it only when u become young....

It happened with two of my friends...

They were both very normal guys till school days but got this problem in there college lives....

And i've observed both the dominant cases of polarity...

In both the cases they were quite normal before around 19

but soon after that they faced this problem....

And not realizing is not a big deal... According to one of the doctors i met 40% of the people suffer from some sort of mental disease in low or high amount...

According to the U.S. government's National Institute of Mental Health (NIMH), "There is no single cause for bipolar disorder鈥攔ather, many factors act together to produce the illness." "Because bipolar disorder tends to run in families, researchers have been searching for specific genes passed down through generations that may increase a person's chance of developing the illness." "In addition, findings from gene research suggest that bipolar disorder, like other mental illnesses, does not occur because of a single gene.".[28]