It is just unbelievable how many BP people we have today, all around the world, while 20 years ago it was very rare disease... BP became very "in".
Some people accept BP diagnosis, because they feel guilty because of "ups and downs" they have in the mood , what usually happens when they cannot cope with difficulties in life, that is traumatic for many.
Some people have hormonal imbalance - as a product of. e.g. thyroid disease - they also can get BP diagnosis, because symptoms of thyroid problems completely match BP symptoms... Some people have lack of certain nutrients in the body - that causes extreme behavioural changes - they also get BP diagnosis.
Some people like to be on medications so accept BP diagnosis, or any other mental disorder diagnosis that would give them opportunity to get numb .
Some people get various behavioural problems after misuse of alcohol or drugs - nothing to do with BP, but they get BP diagnosis.
Of course, medications make situation worse, if BP disorder is misdiagnosed, and so often it is.
Detailed explanation of misdiagnosing the BP is in my Hub: http://hubpages.com/t/5309a