People with anxiety disorders respond to certain objects or situations with fear and dread. Anxiety disorders can include obsessive-compulsive disorder, panic disorders, phobias, and Post-Traumatic Stress Disorder (PTSD).
Mood disorders involve persistent feelings of sadness or periods of feeling overly happy, or fluctuating between extreme happiness and extreme sadness. Mood disorders can include depression, bipolar disorder, Seasonal Affective Disorder (SAD), and self-harm.
People with personality disorders have extreme and inflexible personality traits that are distressing to the person and may cause problems in work, school, or social relationships. Personality disorders can include antisocial personality disorder and borderline personality disorder.