Skin-picking disorder is regarded as a type of obsessive-compulsive and related disorders according to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition. Selective serotonin reuptake inhibitors (SSRIs) are reported to be effective in the treatment of skin-picking disorder. However, these agents can cause opposite effects in some cases. There is a report on SSRI-induced skin-picking disorder in adults. However, to our knowledge, there are no data regarding SSRI-induced skin picking in children. We present the case of a preschool girl with separation anxiety disorder who displayed skin-picking and compulsive-asking behaviors after fluoxetine therapy.