(HealthDay News) -- Every teen has occasional bouts with bad moods.

But when these feelings become debilitating or last for weeks or months, they could be a sign of depression.

Helpguide.org says the most important thing teens can do is talk to others about what they're going through. The group offers these suggestions:

• Talk to friends, school counselors, parents, family, or teachers about your feelings.
• If school, grades, or exams are contributing to depression, talk to your teachers and guidance counselors for support.
• If you're worried about being pregnant, talk to your doctor or a family planning clinic.
• Stay busy, and surround yourself with positive people who make you feel good about yourself. Avoid people involved with drugs and alcohol.
• Talk to your doctor about whether medication and counseling are appropriate options.