Health topics
Mental disorders
![](https://web.archive.org/web/20130622065948im_/http://www.who.int/sysmedia/images/topics/mental_disorders.jpg)
Mental disorders comprise a broad range of problems, with different symptoms. However, they are generally characterized by some combination of abnormal thoughts, emotions, behaviour and relationships with others. Examples are schizophrenia, depression, mental retardation and disorders due to drug abuse. Most of these disorders can be successfully treated.