“…One study (Phillips, Siniscalchi, & McElroy, 2004) found that patients with BDD experienced higher levels of anger and hostility than normal controls. In trichotillomania and excoriation, the functional relationship of the anger is particularly interesting; anger sometimes serves as an antecedent to a hair-pulling or skin-picking behavior, and this behavior serves to reduce intense negative emotion (Diefenbach, Mouton-Odum, & Stanley, 2002; Freunsgaard, 1984; Musaph, Prakken, & Bastiaans, 1964; Obermayer, 1955; Seitz, 1951, 1953; Shusterman, Feld, Baer, & Keuthen, 2009; Waisman, 1965; Zaidens, 1964). However, in other disorders, such as OCD, the anger appears to be a consequence of the disorder and results in angry behavior that may be directed inward or outward.…”