Trichotillomania has a high overlap with post traumatic stress disorder, and some cases of trichotillomania may be triggered by stress. Another school of thought emphasizes hair pulling as addictive or negatively reinforcing, as it is associated with rising tension beforehand and relief afterward. A neurocognitive model — the notion that the basal ganglia play a role in habit formation and that the frontal lobes are critical for normally suppressing or inhibiting such habits — sees trichotillomania as a habit disorder.Abnormalities in the caudate nucleus are noted in OCD, but there is no evidence to support that these abnormalities can also be linked to trichotillomania. One study has shown that individuals with trichotillomania have decreased cerebellar volume. These findings suggest some differences between OCD and trichotillomania. There is a lack of structural MRI studies on trichotillomania. In several MRI studies that have been conducted, it has been found that people with trichotillomania have more gray matter in their brains than those who do not have the disorder.It is likely that multiple genes confer vulnerability to trichotillomania. One study identified mutations in the SLITRK1 gene. Diagnosis
Patients may be ashamed or actively attempt to disguise their symptoms. This can make diagnosis difficult as symptoms are not always immediately obvious, or have been deliberately hidden to avoid disclosure. If the patient admits to hair pulling, diagnosis is not difficult; if patients deny hair pulling, a differential diagnosis must be pursued.
Trichotillomania (TTM), also known as hair-pulling disorder or compulsive hair pulling, is a mental disorder characterized by a long-term urge that results in the pulling out of ones own hair. A brief positive feeling may occur as hair is removed. Efforts to stop pulling hair typically fail. Hair removal may occur anywhere; however, the head and around the eyes are most common. The hair pulling is to such a degree that it results in distress and hair loss can be seen.The disorder may run in families. It occurs more commonly in those with obsessive compulsive disorder. Episodes of pulling may be triggered by anxiety. People usually acknowledge that they pull their hair, and broken hairs may be seen on examination. Other conditions that may present similarly include body dysmorphic disorder; however, in that condition people remove hair to try to improve what they see as a problem in how they look.Treatment is typically with cognitive behavioral therapy. The medication clomipramine may also be helpful, as will keeping fingernails clipped. Trichotillomania is estimated to affect one to four percent of people. Trichotillomania most commonly begins in childhood or adolescence. Women are affected about 10 times more often than men. The name was created by François Henri Hallopeau in 1889, from the Greek θριξ/τριχ; thrix (meaning hair), along with τίλλειν; tíllein (meaning to pull), and μανία; mania (meaning madness). Signs and symptoms
Trichotillomania is usually confined to one or two sites, but can involve multiple sites.