Out of all the people in the world with bipolar, it wouldn't surprise me if Marijuana has helped some of them. As a general rule however, self medicating is discouraged as a treatment option.

I use marijuana on occasion for chronic pain and sickness. It's a life saver for me sometimes. I do not use it to treat my bipolar though.

Whatever you decide, it's best to discuss your decision with your doctor.

Best of luck.