Trichotillomania: Causes, Test, Treatment, and Whether the Hair Grows Back

What is trichotillomania?

Trichotillomania, also called pathological hair pulling, is a mental health condition within the spectrum of body-focused repetitive behaviors (BFRBs). The WHO lists it in the ICD-11 under code 6B25.0, related to skin-picking disorder. People with the condition repeatedly pull out their own hair even though they do not want to.

In the DSM-5, trichotillomania appears in the chapter “Obsessive-Compulsive and Related Disorders,” alongside obsessive-compulsive disorder and skin-picking disorder. One telling sign of how the thinking has shifted: in the older ICD-10 it was still classified as an “impulse control disorder.” Its reclassification in the ICD-11 reflects today’s understanding of it as a distinct BFRB.

Experts distinguish two patterns. With automatic pulling, people only notice it afterward, for example while reading or watching TV. With focused pulling, it is a deliberate act, often triggered by the feeling of a hair that seems “wrong,” with tension beforehand and relief afterward (Grant & Chamberlain, 2016).

Important for understanding it: trichotillomania is not a bad habit and not a character flaw. One DSM-5 criterion in particular sets the disorder apart from a mere habit: repeated attempts to stop fail despite real distress. According to the German Medical Journal (Deutsches Ärzteblatt), the exact neurobiological mechanisms remain “largely unexplained.”

Trichotillomania: causes and psychological triggers

The causes of trichotillomania are multifactorial. There is no single cause, but an interplay of genetic predisposition, altered stimulus processing in the brain, and psychological triggers such as stress, tension, anxiety, boredom, or sadness. Pulling relieves tension in the short term and is thereby reinforced.

This is exactly where the central psychological cause of hair pulling lies. According to the German Medical Journal, pulling is usually not triggered by a specific external event but by a generally heightened inner tension. Pulling brings brief relief. This reward cements the behavior and turns it into a learned self-soothing pattern.

This cycle explains why simply “pulling yourself together” rarely works: a trigger or inner tension leads to the urge, the urge to pulling, pulling to short-term relief, and often afterward to shame or frustration, which raises the tension again. This reinforcement pattern is the foundation of the effective behavioral therapies (see Treatment).

Some people report distressing experiences such as bullying, violence, or abuse as a possible contributing trigger. But this does not apply to everyone: the German Society for Obsessive-Compulsive Disorders emphasizes that many begin without any recognizable trigger, for example out of boredom. So trichotillomania is not an inevitable consequence of trauma, and no one needs to fit themselves into a mold that does not apply.

Additional mental health burdens are common. The review article by Grant and Chamberlain reports major depression in 39% to 65%, anxiety disorders in 27% to 32%, and obsessive-compulsive disorder in 13% to 27% of those affected. Importantly, trichotillomania usually begins before these co-occurring conditions, so it is a distinct disorder and not a consequence of them. For a broader picture, see our overview of the causes of hair loss.

Who is affected? Frequency, age, and body areas

Trichotillomania typically begins in early puberty. Grant and Chamberlain describe the age of onset across studies and cultures as “remarkably consistent” at around 10 to 13 years. According to the DEXIMED patient information, about two-thirds of those affected develop the disorder during puberty.

The sex distribution shows a clear pattern: in childhood, boys and girls are affected about equally, while in adulthood women predominate at a ratio of roughly 4:1 (Grant & Chamberlain, 2016). This difference may partly reflect underreporting among men. For more on this, see our article on hair loss in women.

Hair is most often pulled from the scalp, followed by the eyebrows and eyelashes, and less often from the beard and body hair. The ICD-11 description explicitly names the scalp, eyebrows, and eyelashes as typical areas. These spots are a symptom of the disorder, not a case for cosmetic correction: treatment always starts with the behavior.

A special case is hair pulling in young children under about five years of age. It often occurs as self-soothing while falling asleep, similar to thumb-sucking, and is usually benign and temporary. Even so, any bald spot on a child should be evaluated by a doctor (more on this in the section for parents).

Is trichotillomania a compulsion, an addiction, or self-harm?

Trichotillomania is not a classic addiction and not intentional self-harm, but a distinct body-focused repetitive behavior within the broader obsessive-compulsive spectrum. This classification comes from the DSM-5 and is more than a matter of words: it determines the right therapy.

The difference from obsessive-compulsive disorder (OCD): in classic compulsions, the ritual is usually preceded by anxiety-laden, intrusive thoughts that are meant to be neutralized. In trichotillomania, this element is absent in many people; the tension-relief pattern is what stands out. That said, a co-occurring obsessive-compulsive disorder is present in a minority of cases.

The difference from non-suicidal self-injury: there, the injury is usually the conscious goal. In trichotillomania, hair loss is a consequence of regulating tension, not its purpose. People generally do not want to harm themselves but to relieve inner tension. There are parallels to addiction in the reinforcement mechanism, but it is not a substance or behavioral addiction in the narrower sense.

Trichotillomania test: How do I recognize the disorder?

A real trichotillomania test, in the sense of a diagnosis, is only available from a specialist physician or a licensed therapist. The diagnosis is made by a professional based on the five DSM-5 criteria during a conversation. In clinical practice and research, the Massachusetts General Hospital (MGH) Hairpulling Scale by Keuthen et al. (1995) serves as the standard tool for tracking progress, not for self-diagnosis.

Clinical signs support the assessment but do not prove anything on their own: irregularly shaped bald areas with hairs of different lengths and broken stubble, often on the side of the head that is easy to reach with the dominant hand, without the smooth, as-if-shaved skin seen in alopecia areata.

Trichotillomania or alopecia areata? The important difference

Trichotillomania and alopecia areata both cause bald spots but are fundamentally different. Trichotillomania is psychologically driven, mechanical pulling. Alopecia areata is an autoimmune condition in which T cells attack the hair follicle. A dermatologist can tell them apart reliably, among other things through trichoscopy.

The distribution pattern is the first clue: in alopecia areata, round, sharply bordered, smooth patches form. In trichotillomania, the areas have irregular borders and contain hairs of different lengths. Under the trichoscope, the distinction becomes clear-cut, as the following overview shows.

The trichoscopy signs are well documented: according to a systematic review on diagnostic accuracy, hook hairs (100% specificity), the V-sign (99%), and coiled hairs (99.6%) are highly specific for trichotillomania. The V-sign occurs in 58% of trichotillomania cases according to Rakowska et al. (2014), but in only 8% of alopecia areata. More on this in the article alopecia areata.

Treating trichotillomania: what actually helps

The most effective trichotillomania treatment is a specific form of behavioral therapy, habit reversal training (HRT), often supplemented by the ComB model. Medications are a second-line option, and none is specifically approved for trichotillomania.

Psychotherapy: the first choice

Habit reversal training is the evidence-based first-line therapy. It combines self-monitoring (awareness training), practicing a competing response, and stimulus control, typically over 4 to 22 sessions. An older meta-analysis ranked HRT clearly above drug treatment, with an effect size of about Cohen’s d −1.14.

A controlled Dutch comparison study (n=43) cited by the German Medical Journal shows how clear the difference can be: six sessions of behavioral therapy led to a 64% reduction in symptoms, the antidepressant fluoxetine to only 9%, and the waitlist control group to 20%. The sample was small, but the direction clearly favored behavioral therapy.

The ComB model (Comprehensive Behavioral Model) by Charles Mansueto expands HRT with an individual analysis of triggers across five modalities (sensory, cognitive, affective, motor, and environmental). It is regarded as a useful complement in more complex or chronic cases. In all honesty, relapses are part of the course; more on that below.

Medications: second choice, only under medical supervision

Among medications, N-acetylcysteine (NAC) is discussed most often. In a double-blind, placebo-controlled study by Grant, Odlaug, and Kim (2009) in the journal Archives of General Psychiatry (n=50 adults), 56% of the NAC group improved significantly compared with 16% on placebo. However, NAC is not approved specifically for trichotillomania; it should only be taken under a doctor’s supervision.

Especially important for parents: a pediatric study found no difference between NAC and placebo in children and adolescents (response rate 25% versus 21%). For young people, behavioral therapy is therefore clearly the priority. SSRIs such as fluoxetine are considered weakly supported and are usually used only for co-occurring conditions such as depression, as a case-by-case medical decision.

Self-help and where to turn

Alongside therapy, dedicated organizations can help you get your bearings. Internationally, the TLC Foundation for BFRBs (bfrb.org, founded in 1991) is the central resource, with a directory of support groups and treatment providers. The following overview shows what to look for in your search.

What helps in everyday life? Immediate-relief strategies

Small behavioral barriers and more awareness can weaken the pulling urge in the moment. This immediate relief does not replace therapy but supports it. The following points are derived from habit reversal training and align with the simple, practical tips from the UK’s NHS.

A trigger journal makes patterns visible that you would otherwise miss. Over a few days, write down which situation the urge showed up in, what feeling came before it, and what helped. The following examples show what such entries can look like.

Does hair grow back after pulling?

In most cases, hair grows back after trichotillomania. As long as the follicles are intact, they resume their activity once the pulling stops for good. The first fine hairs usually become visible over a few months. Only with very prolonged, repeated pulling can individual follicles be permanently damaged.

The reason lies in the natural hair cycle: once the pulling strain is gone, the follicles, which were initially in the resting phase (telogen), re-enter the growth phase (anagen). The following timeline is a rough guide based on general hair-growth physiology, not a study figure specific to trichotillomania.

The decisive factor is duration: occasional or short-term pulling usually leads only to temporary thinning. Pulling repeated over years in the same spot, by contrast, can permanently damage the follicles through repeated mechanical strain. Stay cautious with predictions: there is no fixed regrowth timeline documented for trichotillomania.

Scalp care during the recovery phase

During the recovery phase, the scalp above all needs gentle care after pulling. Clean the affected areas mildly and without vigorous rubbing, and avoid harsh styling products, heat, and tightly pulling hairstyles. Any further mechanical strain can slow the follicles’ recovery. If redness, flaking, crusting, or signs of inflammation appear, it should be evaluated by a dermatologist.

Can trichotillomania lead to permanent hair loss? And when a hair analysis makes sense

Permanent hair loss from trichotillomania is rare. Short-term pulling usually does not damage the follicles permanently. Only years of repeated pulling can act as a form of traction alopecia and, through chronic inflammation, lead to scarring, in which functioning follicle tissue is replaced by scar tissue. There is no reliable frequency figure for this risk; it is based on clinical experience and case reports.

This leads to a clear order of steps. The first and most important step is always the psychotherapeutic treatment of the disorder. A hair transplant is contraindicated while pulling is active, because transplanted hairs would be pulled out just the same and the underlying condition would remain untreated. It is not a solution for trichotillomania.

Only after stable remission, meaning once the pulling has stopped for good, and only for remaining areas that no longer grow back, does the question of restoration even arise. A hair analysis, as a visual pattern analysis with a trichoscope, can then help assess whether the follicles are reversibly irritated or permanently damaged. It does not replace a medical diagnosis but helps distinguish reversible irritation from scarring.

If, after successful treatment, the issue is remaining scarred spots, Elithair works with the extraction of individual grafts (FUE) and DHI implantation. This concerns only the cosmetic result after completed behavioral therapy, never the disorder itself. A free hair analysis can, in this case, clarify whether the areas are reversible or scarred.

Trichotillomania in children: what parents should know

In young children, hair pulling is often a temporary phase within self-soothing, frequently alongside thumb-sucking or nail-biting. According to the TLC Foundation, the outlook in young children is mostly favorable, and the pulling often stops on its own. Even so, the rule holds: any bald spot on a child should always be evaluated by a pediatrician.

This evaluation rules out physical causes such as a skin condition, alopecia areata, or sources of stress like teething. Do not rely on a blanket “they’ll grow out of it.” In school-age and adolescent years, where the disorder often begins at 10 to 13 years, an evaluation by a child and adolescent therapist makes sense.

For parental behavior, the rule is: stay calm, offer closeness, do not punish, and do not shame. As for heredity, familial clustering is documented, and a genetic contribution is assumed. But predisposition is not a certainty; most children of affected parents do not develop trichotillomania. Also keep an eye on whether your child puts pulled-out hairs in their mouth (see trichophagia).

Covering up bald spots in everyday life

Until the hair grows back, bald areas can be bridged discreetly. Covering up is explicitly allowed and is not giving up: it lowers the distress while the actual treatment is underway. The only thing that matters is that covering up does not replace the therapy.

Practical options are hair fibers (fiber powder for thin spots), adapted hairstyles with a shifted part, scarves, caps, or bandanas, and for larger areas a hairpiece. For eyelash or eyebrow loss, subtle cosmetic stopgaps help. The NHS also names caps and bandanas as practical self-help.

One note: hairstyles that constantly pull, such as tight braids or extensions, put additional strain on the already stressed areas and should be avoided during the recovery phase. The goal is to spare the follicles any further mechanical strain.

Outlook: Do people grow out of trichotillomania?

In young children, the pulling often disappears on its own. If trichotillomania begins in puberty or adulthood, however, it usually runs a chronic and fluctuating course, with better and worse phases. According to DEXIMED, it becomes considerably more persistent once it lasts longer than six months, and it rarely resolves on its own without treatment.

With behavioral therapy, significant improvement is realistic, as the 64% symptom reduction in the Dutch study shows. At the same time, honesty requires this: according to a systematic review, 50% to 67% of initial responders experience a relapse over the long term. A relapse during stressful periods is therefore common and not a personal failure, but part of the typical course.

Trichophagia and Rapunzel syndrome

Some people eat the hairs they pull out, which is called trichophagia. Swallowed hair can compact in the stomach into a hairball (trichobezoar). If it extends into the small intestine, this is called Rapunzel syndrome, a very rare but serious medical emergency.

Rapunzel syndrome is an exceptional occurrence: as of 2019, a case review described about 120 cases in the world literature, roughly 90% of them women and about 80% under 30 years of age. Warning signs are abdominal pain, nausea, a feeling of fullness, unexplained weight loss, or a palpable abdominal mass. If these occur in someone with known trichophagia, it should be evaluated by a doctor without delay.

Frequently asked questions about trichotillomania

Conclusion

Trichotillomania is a treatable mental health condition, not a lack of willpower. Behavioral therapy, above all habit reversal training, works demonstrably better than medication alone. The most important step is therefore to seek professional psychotherapeutic help instead of blaming yourself.

For the hair, the rule is: in most cases it grows back once the pulling stops, because the follicles are intact. A hair transplant is no substitute for treatment and is contraindicated while pulling is active. As of 2026, the clear message remains: treat the disorder first, then think about any remaining spots.

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