Querulant delusion and post-traumatic embitterment disorder.

Injustice, breach of trust, and humiliation are social stressors which can result in embitterment, known to everybody and which has been described in the Bible (Cain and Abel) or by Aristotle in the Nicomachean Ethics. It has been discussed by several authors since the early days of psychiatric classification. In the textbook 'Psychiatry' by E. Kraepelin a full chapter is devoted to 'querulant delusion', named a reactive psychosis, which can be discriminated from endogenous psychosis or personality disorders. Core symptoms are embitterment, negativism, helplessness, self blame, unspecific somatic symptoms, phobic avoidance of persons or situations related to the event, intrusions, phantasies of revenge and aggression. Another name is 'Posttraumatic Embitterment Disorder' according to the leading emotion. This severe mental disorder has by and large been ignored over the years by health professionals. In ICD-11 the term embitterment is mentioned for the first time in the category '6B43 adjustment disorder'. Embitterment can be measured with the 'Bern Embitterment Inventory (BVI)' and the 'Post-Traumatic Embitterment Self-rating Scale (PTED scale)'. Treatment must take into account the special features of embitterment including often aggressive rejection of help. A promising treatment approach is, to refer to wisdom psychology and transfer this in 'wisdom psychotherapy'.