Body dysmorphic disorder is characterised by a preoccupation with an imagined or present flaw in physical appearance, with exaggeration of the flaw and excessive concern about it. It causes significant difficulties in everyday life and consequently leads to reduced psychological well-being and life satisfaction. The disorder has not been well researched in Croatia yet, so we were interested in exploring some determinants of this disorder. The aim of the study was to determine the relationship between the presence of body dysmorphic disorder symptoms and anxiety sensitivity, environmental sensitivity and appearance-based rejection sensitivity. There were 1025 participants who took part in the survey, of which 90% were women and 10% were men. Psychodiagnostic instruments were used to examine the presence of symptoms of body dysmorphic disorder, anxiety sensitivity, environmental sensitivity, appearance-based rejection sensitivity, life satisfaction, and levels of depression, anxiety and stress. The conditions for the existence of symptoms of body dysmorphic disorder were met by 11.5% of participants, with 12.1% among women and 5.8% among men. Due to the unequal size of the samples between the sexes, we decided to conduct analyses only on female participants. Participants with symptoms of body dysmorphic disorder had significantly more anxiety sensitivity and concerns related to cognitive, social and physical aspects of anxiety, environmental sensitivity and ease of arousal, and appearance-based rejection sensitivity compared to those without symptoms. They had significantly lower life satisfaction, higher levels of depressive and anxious symptoms, and increased symptoms of stress. Appearance-based rejection sensitivity has the most significant contribution to group differentiation, and concerns related to cognitive and social aspects of anxiety and ease of arousal are significant to a lesser extent.