Our case report is on the use of electroconvulsive treatment (ECT) in an adolescent with Bipolar Disorder (BPD), Substance Use Disorder (SUD) and comorbid Body Dysmorphic Disorder (BDD). In our case, ECT was not considered at the first stage, but we encountered medication noncompliance and treatment resistance. Symptoms of body dysmorphic disorder completely disappeared after ECT, which is consistent with the literature. ECT is a treatment with a low side effect profile in treatment-resistant cases. In addition, it will be useful to increase the knowledge and experience of clinicians on ECT and to provide conditions for ECT in child and adolescent psychiatric clinics.