Mood disorders are a group of illnesses in which the primary aspect is a disturbance in the way a person feels, i.e. the person’s mood. The most common mood disorder is depression which is often characterized by strong feelings of sadness and a loss of interest in usual activities lasting for at least several weeks.

Schizophrenia is a severe disorder which effects between 1% and 2% of the population. While it is much less common than depression, it can cause very severe disruptions in an individual’s life and ability to function.

Children are susceptible to a variety of emotional problems, in part due to their immaturity and their abilities to deal with stress. These problems may be apparent in a range of behavioral or emotional symptoms, disruptions in family home life, or in the school setting. There are also disorders which seem to be related to a biological vulnerability, and two of the most common of these are Attention Deficit Hyperactivity Disorder and Autism.

Suicide or suicidal tendencies involve thinking about taking one’s own life, making an attempt to take one’s own life, or completing suicide. In many countries around the world there has been a substantial increase in suicide rates over the last several decades. In a number of countries, suicide is one of the top causes of death in nearly every age category.

The term “mental disorder” refers to a condition in which there is a substantial change in someone’s behavior, emotions, thinking, or general psychological state, which becomes very different from the usual. This condition can affect an individual’s ability to function in one or more areas of their daily lives.