What is the difference between bipolar and depression?

Bipolar you pretty much just go through constant mood swings. When you are depressed it’s a constant feeling.

When you hear people talk about being diagnosed with or treated for depression, they are often referring to unipolar depression. There are important differences between unipolar depression and bipolar depression – differences in how the illness makes people feel and behave, and differences in how they are supported through treatment. In addition to going through low moods or depression, individuals with bipolar disorder also have high moods known as mania during which they may experience increased energy, feelings of euphoria, insomnia (inability to sleep) or impulsive behaviors like shopping sprees or promiscuous sex. Someone with unipolar depression doesn’t go through the “highs” of bipolar depression. Source: http://www.ulifeline.org/articles/399-bipolar-depression-vs-unipolar-depression

Depression is more than just feeling low. It's a deep sadness or emptiness you can't shake. You might feel hopeless, worthless, and restless. You might lose interest in things that you used to enjoy. Depression often goes hand-in-hand with sleep problems, changes in appetite, and trouble concentrating. It can lead to suicidal thoughts or actions. People who suffer with depression might have some days that are better than others. But without proper treatment, their mood tends to remain low. Bipolar disorder (sometimes called manic depression) is different. If you have it, you have extreme mood swings. You experience periods of depression. But you also have periods of great highs. Bipolar refers to the opposite ends, or poles, of the emotional spectrum -- the highs (mania) and the lows (depression). You might be severely depressed for a period of hours, days, weeks, or even months before entering a manic period. The mania could range from several days to two months or longer. It's also possible to have a type of bipolar disorder in which you experience manic and depressive symptoms at the same time. You might feel sad and hopeless but also be very agitated and restless.