occurs as a consequence of other mental disorders. Delusions of this type seem to follow from the symptoms that cause them, have a direct connection with them, and can be understood through them. In some cases, even with a significant number, they do not need treatment on their own, but lose their relevance as the disorders that cause them are stopped. For example, acute sensory delusions that arise within the framework of delirious confusion (see Delirium in Chapter 4.1. Definition of Psychological Disorders and Appropriate Methods of Their Treatment) disappear on its own as the state of disturbed consciousness comes out, even in the absence of treatment or only against the background of detoxification therapy with the use of tranquilizers. Usually, the content of secondary delusions is changeable, reflects a momentary reaction to the external environment and the psychopathological symptoms that determine the development of this type of delusion.