Please tell me if i go see a psychiatrist or a psychologist about my nightmares?

Psychiatrist: If you see a psychiatrist, s/he can prescribe medications if indicated--for example if nightmares are related to depression, mood or anxiety problems. A psychiatrist, psychologist, or other therapist can help you with psychotherapy that may decrease the nightmares or make them more manageable.

You could start : With either a psychiatrist or psychologist. The psychologist may refer to a psychiatrist if medications or further medical eval is indicated. The psychiatrist may refer to a psychologist if certain types of therapy are indicated.

Difference : Typically psychiatrists prescribe medicine for sleep disturbances that can include nightmares. However, psychiatrists tend not to do all that much therapy. On the other hand, psychologists help patients deal with the emotional content of nightmares, but they do not have prescript of power, as do psychiatrists.