Overweight and obesity are widespread in industrial countries and are consi
dered to be serious health problems in these countries. Population-based st
udies in Germany have shown that between 12 and 18% of the adult population
is obese. Overweight and obesity are accompanied by a large spectrum of he
alth disorders and extreme psychosocial burdens. Besides the hereditary dis
position, the life style including both intra- and inter-individual aspects
determines the complex, etiology of obesity. Within the collective sample
of the obese, one sub-sample is the "psychogenic obese" i.e. in which psych
iatric disorders lead to a change in both eating and exercise behavior, the
result then being a continuous positive energy reserve in the form of over
weight and obesity. The paper describes the psychosocial problems of obese
persons; especially the controverse question with regard to psychiatric mor
bidity in general and eating disorders in particular are emphasized. The re
sults of past, mainly behavioral oriented treatment concepts are presented
and various concepts beyond single school orientation are discussed. Finall
y, the problems with psychiatric psychological diagnostics in those obese p
atients with the request for surgical weight reduction within the context o
f insurance coverage and the surgeons are presented.