The only way to know for sure is to see a doctor and get a diagnosis. You can watch for symptoms and let the doctor know what you have seen, however. Bipolar people swing between moods and are not able to control this. They are very unpredictable, and you cannot tell what sort of response you will get from them most of the time. Bipolar people can get very irritable, or very happy, or very depressed. Often they spend a lot of money or do dangerous things like drive too fast or have sex with lots of different people.
First, bipolar must be diagnosed by a psychiatrist! You cannot do it yourself.
That said I suggest reading:
The DBSA is also a good organization to contact.
Symptoms of Bipolar disorder are recognizable as mood swings. Sufferers may appear excessively happy one moment, then unbearably sad shortly thereafter.
One can find information on what causes bipolar disorder in humans by using websites such as Wikipedia or NIHM that tells you everything you need to know about bipolar disorder and how it is caused in humans.
Doctors think that bipolar disorder is caused by stress. Others believe that it's a mental illness that you can treat with medicine.
Bipolar disorder
Bipolar disorder is generally caused by genetics.
The correct term is bipolar disorder. Some people call it a disease though.
Worrying or focusing intensely on things is apart of Bipolar disorder. Its as if you worry about thing that you know you shouldn't and can't help imagining something bad happening.
a disorder
http://blogs.psychcentral.com/bipolar/2009/01/bipolar-disorder-qa-how-close-are-we-to-a-bipolar-cure/
Yes, stress makes Bipolar Disorder behavior worse. My daughter is Bipolar.
It's not known to be an effective treatment for bipolar disorder.
Bipolar Disorder, not otherwise specified. It means a form of Bipolar Disorder that doesn't really fit the other diagnostic categories.
They may be used in conjunction with mood stabilizing medication, which are used for bipolar disorder, but they are not used alone as a solution to bipolar disorder.