DEAR ABBY: I'm 14 years old. A lot of times when I am feeling really happy and I'm talking to friends on the Internet, all of a sudden I feel a wave of sadness. And I remember bad things, like when my best friend died when I was little. But then I'll feel happy again. I don't know why this happens all the time. What do you think? -- BUMMED OR NOT IN ILLINOIS
DEAR BUMMED OR NOT: Mood swings can be hormonal, especially at your age. However, since you were concerned enough to write to me, your next step should be to discuss the mood swings with your parents so they can schedule an appointment for a medical evaluation. There is probably nothing to worry about, but you should hear it from your doctor.