Common conditions include anxiety disorders, eating disorders and mood disorders. Mood disorders are also known as affective disorders or depressive disorders. Patients with these conditions have significant changes in mood, generally involving either mania (elation) or depression.
Anorexia nervosa, is an eating disorder characterized by low weight, fear of gaining weight, and a strong desire to be thin, resulting in food restriction. Many people with anorexia see themselves as overweight even though they are in fact underweight.
An emotional disorder involving distortion of body image and an obsessive desire to lose weight, in which bouts of extreme overeating are followed by depression and self-induced vomiting, purging, or fasting.
The person experiences sudden paralyzing terror or a sense of imminent disaster.
Post-traumatic Stress Disorder
This can occur after somebody has been through a traumatic event. The person thinks that their life or other people's lives are in danger. They may feel afraid or feel that they have no control over what is happening.
Binge Eating Disorder
Binge eating disorder is a severe, life-threatening, and treatable eating disorder characterised by recurrent episodes of eating large quantities of food (often very quickly and to the point of discomfort.
The individual is no longer interested in and does not enjoy activities and events that they previously liked. There are extreme or prolonged periods of sadness.
Persistent Depressive Disorder
Previously known as dysthymia, this is mild chronic (long term) depression. The patient has similar symptoms to major depression but to a lesser extent.
Seasonal Affective Disorder (SAD)
A type of major depression that is triggered by lack of daylight. It is most common in countries far from the equator during late autumn, winter, and early spring.
Previously known as manic-depressive illness, or manic depression. The individual switches from episodes of euphoria (mania) to depression (despair).
Obsessive Compulsive Disorder
The person has constant stressful thoughts (obsessions), and a powerful urge to perform repetitive acts, such as hand washing (compulsions).
These may include simple phobias (a disproportionate fear of objects), social phobias (fear of being subject to the judgment of others), and agoraphobia (dread of situations where getting away or breaking free may be difficult).