"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.
Everyone has bad days, which is one reason this kind of bipolarity is much harder to recognize.
"We are all irritable or moody sometimes," Dr. Bearden says. "But in people with bipolar disorder it often becomes so severe that it interferes with their relationships—especially if the person is saying, 'I don’t know why I’m so irritable…I can’t control it.'"