OBJECTIVES: Psoriasis is a chronic skin disease that causes an important physical, psychological, and economic impact on the people affected. However social impact has not been studied until recently. The objective of this study was to examine the social impact of psoriasis as reported by patients. METHODS: Data came from the study “Acción 2014”, an online survey carried out by the Spanish association of patients and their families affected by Psoriasis and psoriatic arthritis (“Acción Psoriasis”), the study took place from December 2013 to April 2014. We included all psoriatic Spanish participants, and we examined the set of 13 items referred to the social impact of psoriasis using a Rasch model. This implied studying the scale functioning, item fit, item dependency, and the unidimensionality assumption. The units of the Rasch (logits) were transformed into a 0-10 scale. We analysed overall differences between groups of patients with ANOVA tests. RESULTS: A total of 731 participants had the inclusion criteria, mean age was 45 years old (SD=6.3). Seventy six percent (n=490) reported being affected of a skin psoriasis, 1.64% (n=12) by psoriatic arthritis, and 31.33% (n=229) by both types. Items causing higher social impact were those related to personal exposure in public places (scale 0-10: 6.08) and participation in sport activities (scale 0-10: 5.68); Less than half of participants reported managing these two issues successfully. Social impact of psoriasis was higher in younger participants, living alone, or not married, unemployed, and with less household income (p<0,001). CONCLUSIONS: Impact of psoriasis might be assessed and requires clinical, social actions and emotional support to ensure patients with psoriasis having the best care. Specific population groups need specific health care interventions to avoid harms of socialization linked to psoriasis.