Psychosocial risks and emotions at work are widely studied today. Given that emotions at work can regulate difficulties and be constraining, research on emotional labor can help to understand activity, coping strategies and effects on heath. This paper presents a case study in a company, analyzing emotions related to health activities with customer advisers in Call Centers. It describes how emotions are expressed and dissimulated by employees. It analyzes emotions, in relation to labor and its effects on health, focusing on Customer Advisers in Call Centers. The paper shows the job constraints and the strategies used to cope with them. Psychosocial risks are particularly examined, through the most difficult work situations, and the impacts in terms of stress. The applied and followed prevention solutions are finally discussed.