This booklet aims at raising awareness of this growing issue of concern by providing information on its characteristics, such as the definition, differences between normal conflicts and psychological harassment at work, the ways it is practised, the consequences it can produce on health and society. Special attention is devoted to the causes that favour its development and the measures to be adopted in order to combat it and react to it. [Contents] Some facts. - Psychological harassment at work (mobbing). - Differences between normal conflicts and mobbing. - Effects on health and quality of life. - Risks. - Prevention. - How to detect mobbing and how to deal with it. - Further reading. - Further information.