How do i explain bipolar disorder to people ?

Bipolar disorder: If you do have to explain it to people, the best way is to tell the truth, which is: my mood may change without any specific reasons. I may feel depressed for a while, and then i may feel unusually happy and "up" for no particular reason. I may say things which do not make much sense, and some people may even feel annoyed by my overtalkativeness.

An episodic disease: The mood disorder gets all the press but another way to accurately describe bipolar disorder is an episodic (not always occuring) disorder of energy and metabolism affecting one's brain, behavior, and personality. It results in changes in mood, energy, sleep, and appetite, and can be treated with medication, therapy, as well as behavioral treatments like sleep modification and exercise.