It seems most people affected by body dysmorphic disorder (BDD) are teenagers and young adults, both male and female. But it’s not known what causes BDD. As with many health conditions, it’s thought that genetics may play a part; you’re more likely to develop the condition if you have relative with BDD, obsessive compulsive disorder (OCD) or depression. Childhood trauma – being bullied or abused – could also make you more susceptible.