"Chalking it up to moodiness or trouble at work or tiredness is pretty common," says Carrie Bearden, PhD, an associate professor in residence of psychiatry and behavioral sciences and psychology at the David Geffen School of Medical at UCLA. "The disorder varies in severity."
Here are 10 signs that mood problems may be due to more than a quirky or difficult personality.
During a manic phase, they may not sleep enough—but still never feel tired.
Even with just a few hours of sleep each night, they may feel great and have lots of energy.
Dr. Bearden says staying on a regular sleep schedule is one of the first things she recommends for bipolar patients.