Obsessive-compulsive and related disorders (OCRDs) have been introduced in a revision to DSM-5 as a novel category that is distinct from other anxiety disorders in DSM-IV. OCRDs consist of 5 primary disorders: obsessive-compulsive disorder (OCD), body dysmorphic disorder (BDD), hoarding disorder (HD), skin picking disorder (SPD), and hair pulling disorder (HPD), which share core clinical features such as preoccupation or recurrent thoughts and/or repetitive behaviors. Repetitive behaviors in BDD and HD can be differentially characterized by the presence of cognitive components associated with preceding anxiety from those in SPD or HPD, which are only observed as motoric components that regulate emotions or alleviate tension. Thus, the validity of the OCRD category and specific interrelationships between each OCRD remain uncertain.
 In the present study, therefore, we presented a case of multiple comorbidities of OCRDs in order to discuss the nature of the OCRD category.
 Our patient was a 20-year-old female university student. At the age of 11 years old, she started picking at acne on her face.
 The psychopathological, and treatment features observed in this case indicated possible interrelationships among OCRDs, especially between cognitive and motoric OCRDs, which supported the clinical utility and continuous nature of this category.
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