According to DSM-5, there are two criteria needed to be diagnosed with hoarding disorder; firstly, there should be persistent difficulty discarding or parting with possessions, regardless of their actual value, this difficulty is due to a perceived need to save the items, and with the distress associated with discarding them.
Body Dysmorphic Disorder (BDD)
According to DSM-5 there are two main criteria for body dysmorphic disorder: firstly, there needs to be a preoccupation with one or more perceived defects or flaws in physical appearance – that are not observable or appear slight to others. The individual also needs to have performed repetitive behaviours (e.g., mirror checking or skin picking,) or mental acts (e.g. comparing his or her appearance with that of others) in response to appearance concerns.
According to DSM-5, there are 5 criteria needed for a diagnosis of trichotillomania: regular pulling out of one’s hair, causing noticeable hair loss; tension, and an attempt to resist hair pulling; and gratification, pleasure, or relief when pulling out one’s hair. The condition should not be better explained by any other mental disorder and needs to cause significant distress and impairment in one’s daily life.
DSM-5: The Diagnostic and Statistical Manual of Mental Disorders (5th-edition) helps define and classifies mental disorders to improve treatment, diagnoses, and research.