Trichotillomania (TTM) was introduced into the DSM system in 1987 with the revised third edition of the DSM (DSM-III-TR, American Psychiatric Association, 1987). This study addressed the conceptualization of TTM as a discrete disorder and as a sub-clinical condition where individuals engage in problematic hair pulling without meeting all of the criteria for a DSM diagnosis of TTM. The study examined core self-evaluation and life satisfaction in relation to Clinical and Sub-Clinical TTM and a Non-Psychiatric Control group. A total of 198 female participants participated in the study: 87 in the Clinical TTM group, 43 in the Sub-Clinical TTM group, and 68 Non-Psychiatric Control group. Hypotheses #1-8 were supported, indicating that core self-evaluation & life satisfaction differed between groups, even after controlling for comorbid depression & anxiety. Hypotheses #9-16 were not supported, indicating no significant effects observed for severity of hair loss on the dependent variables of core self-evaluation and life satisfaction. The present study and previous work (e.g., Heskeyahu, 2006; Diefenbach et al., 2005; Stanley et al., 1995) suggested that individuals suffering with Clinical or Sub-Clinical TTM display a range of psychosocial symptoms that go well beyond the specific effects of hair pulling as a discrete behavior. The results of the present study suggest that the practitioner should provide services to both Clinical and Sub-Clinical TTM sufferers. If TTM was based on a continuum model it would be much more appropriate in determining the treatment based on the psychosocial effects that are apparent and the amount of hair pulling itself.