Written using DSM-5-TR criteria and peer-reviewed research including Thomson et al. (2022, Journal of Psychiatric Research), Farhat et al. (2020, Depression & Anxiety), McGuire et al. (2014), Grant et al. (2009, Archives of General Psychiatry), and Grant et al. (2023, American Journal of Psychiatry), alongside guidance from the TLC Foundation for BFRBs and the Massachusetts General Hospital Center for OCD and Related Disorders.
What Trichotillomania Is
Trichotillomania is a mental health condition in which someone repeatedly pulls out their own hair, loses hair because of it, and has tried and failed to stop. It's pronounced trick-oh-till-oh-MAY-nee-uh, and most people meet the word for the first time long after the behavior started, usually while searching for something else entirely.
The name is Greek and a bit unfortunate. Thrix is hair, tillein is to pull, and mania is the part that makes people flinch. A French dermatologist named Hallopeau coined it in 1889 to describe baldness caused by self-traction of the hair. The mania part is a nineteenth-century artifact, not a description of anyone. The community mostly says "trich" or "hair pulling disorder," and clinicians increasingly do too.
Hair pulling sits inside a family of conditions called body-focused repetitive behaviors, or BFRBs: self-grooming behaviors that turn destructive. Skin picking and nail biting are the other two most common ones. The TLC Foundation for BFRBs describes them as behaviors involving pulling, picking, scraping, or biting one's own hair, skin, or nails "that can lead to physical damage to the body and have been met with multiple attempts to stop or decrease the behavior."
That last clause is the whole condition in miniature. Not doing it once. Trying to stop, and finding you can't.
Where Hair Pulling Ends and the Disorder Begins
This is the question almost everyone arrives with, and there's a genuinely useful answer to it.
A 2022 systematic review and meta-analysis pooled 30 studies covering 38,526 people. It found that 8.84% of people report hair-pulling behavior of some kind. It also found that 1.14% meet the diagnostic criteria for trichotillomania.
The DSM-5 places trichotillomania in the chapter on Obsessive-Compulsive and Related Disorders, next to OCD, skin picking disorder, body dysmorphic disorder, and hoarding. Five criteria have to be met.
A. Recurrent pulling out of one's hair, resulting in hair loss
Repeated, and it costs you hair. The loss doesn't have to be dramatic or visible to other people. Plenty of people pull in a distributed way specifically so nothing shows.
B. Repeated attempts to decrease or stop hair pulling
You've tried. Possibly hundreds of times. This criterion is the one that quietly rules out the reader who is worried but not affected: if you can decide to stop and then simply stop, this isn't it.
C. The hair pulling causes clinically significant distress or impairment
In social, occupational, or other important areas of functioning. Skipping the pool. Sitting through a haircut with your stomach in knots. Doing your makeup for forty minutes to draw eyebrows on. Distress counts on its own, even when nobody else has noticed a thing.
D. The hair pulling or hair loss isn't attributable to another medical condition
A dermatological cause has to be ruled out first, which is why so many people meet a dermatologist before they meet a therapist.
E. The hair pulling isn't better explained by another mental disorder
Someone with body dysmorphic disorder removing hair they perceive as ugly, or someone with OCD pulling as part of a symmetry ritual, gets a different diagnosis.
There's one more line worth knowing. Hair removal done purely for cosmetic reasons is never trichotillomania, no matter how thorough it is. Neither is twirling, twisting, or playing with your hair. Plucking your eyebrows into shape on a Sunday night is grooming. Plucking them until they're gone, wanting to stop, and going back the next night is something else.
What It Actually Looks Like
Hair pulling varies more between two people with the same diagnosis than almost any other condition in the chapter.
Where people pull from
The scalp is the most common site, followed by eyebrows and eyelashes. Less common sites include the face, the pubic and axillary areas, and the peri-rectal region. Most people pull from more than one place, and the number of sites tends to increase with age.
Scalp pulling often concentrates in the crown or the parietal regions. There's a distinctive pattern clinicians call tonsure trichotillomania: near-complete baldness with a narrow perimeter left around the outer margins of the scalp, particularly at the nape of the neck.
Eyelashes and eyebrows deserve their own mention, because losing them is harder to hide than scalp hair and much harder to explain. Missing lashes also stop doing their job, which is keeping dust out of your eyes.
Automatic and focused pulling
Two styles show up in the research, and most people do both.
Automatic pulling happens outside your awareness. You're reading, driving, on the phone, lying in bed, and your hand goes up. You find out it happened when you find the hairs. MGH describes this as pulling that occurs "when one is engaged in tasks or absorbed in thought."
Focused pulling is deliberate. There's an urge, or a thought, or a specific hair that feels wrong, and you go to find it. This style is often binge-like and produces more hairs pulled per session. It tends to be tied to a negative emotional state or an intense physical sensation.
The rituals nobody talks about
This is the part that makes people feel most alone, and it's in the diagnostic manual.
Many people search for a specific hair before pulling: a particular texture, a coarse one, a gray one, one that feels wrong at the root. Many pull in a specific way so that the root comes out intact. And a lot of people do something with the hair afterwards. Rolling it between the fingers. Running it between the teeth. Biting it into pieces.
None of that is unusual within this condition. All of it is documented.
The concealment tax
The TLC Foundation lists the situations people start avoiding, and the list is oddly specific in a way that will be familiar: windy weather, going to the beach, swimming, doctor's visits, hair salon appointments, childhood sleepovers, getting ready for bed in a lit room, and intimacy.
That's the real cost for most people. Not the hair. The daily arithmetic of hats, partings, powders, scarves, wigs, and angles, plus the decisions you quietly make to avoid needing them.
Who Gets It, and the Myth About Who Doesn't
Trichotillomania usually begins in late childhood or early puberty. The NHS puts the typical onset between 10 and 13. MGH gives a mean age of onset of 11 to 13. It can start at any age, and hair pulling seen in infants is developmentally normal and usually resolves on its own.
Now the part that gets stated wrong almost everywhere.
You'll read that trichotillomania affects women at a ratio of 10 to 1, or 9 to 1. That figure comes from clinical samples and self-report, and it's in the DSM-5-TR. But the 2022 meta-analysis, which pooled epidemiological samples rather than clinic attendees, found no female preponderance in trichotillomania at all.
The TLC Foundation describes the same pattern from the other direction: trichotillomania "occurs about equally in boys and girls," and by adulthood 80 to 90% of reported cases are women.
Two things are probably happening. Men can hide hair loss more easily, because thinning and shaving are unremarkable in men. And men are less likely to report a grooming disorder at all. If you're a man reading this and quietly assuming the numbers mean it isn't your condition, the epidemiology doesn't support that assumption.
Why It Happens
The short version: nobody fully knows, and pages that give you a tidy causal story are overstating the evidence.
What's reasonably established:
It runs in families. Trichotillomania is more common in people with OCD and in their first-degree relatives. Studies consistently find more BFRBs in the immediate families of people with hair pulling or skin picking than you'd expect by chance. No single gene has been identified.
It's tied to emotion regulation, but not simply. Hair pulling appears to help people escape or avoid aversive internal states, giving temporary relief from negative emotion, and that relief maintains the behavior through negative reinforcement. That's the mechanism most treatment models are built on.
It isn't self-harm. The TLC Foundation states this flatly, and it matters clinically as well as personally. The intent isn't injury or punishment. Many people describe pleasure, relief, or gratification at the moment of pulling, which is precisely why it's so persistent and precisely why it's so easy to feel ashamed of.
Hormones seem to modulate it. Symptoms can worsen in women around menstruation and perimenopause.
What It Costs
Most of what trichotillomania takes is invisible, but some of it isn't.
Physical complications
Beyond the hair itself, documented complications include irreversible damage to hair growth and hair quality in some people, skin irritation and infection, digit purpura from repeated pulling, repetitive-motion injuries (carpal tunnel syndrome, and back, shoulder, and neck pain), blepharitis where lashes are pulled, and dental damage in people who bite the hair.
When swallowing hair becomes an emergency
Eating pulled hair is called trichophagia, and it's the one part of trichotillomania that can become a surgical emergency. It's also routinely left out of patient-facing articles or buried at the bottom, which is why it's here instead.
Functional impairment
The Trichotillomania Impact Project surveyed 1,697 people with symptoms consistent with the diagnosis. Across the whole sample it found mild-to-moderate impairment in social, occupational, academic, and psychological functioning, and that impairment scaled with severity.
"Mild to moderate" across a whole sample is easy to under-read. It means the average person with trichotillomania is losing something in every one of those four domains, all the time, quietly.
What Usually Comes With It
Trichotillomania rarely arrives alone.
A 2023 study of 152 people with trichotillomania, skin picking disorder, or both found self-reported anxiety in 63 to 82%, depression in 34 to 50%, OCD in 16 to 29%, and ADHD in 12 to 32%. The same study found that hair-pulling and skin-picking severity both peaked at the transition from adolescence into adulthood.
Other BFRBs are the most common companions of all. The majority of people with trichotillomania also pick their skin, bite their nails, or chew their lips. If you pull and pick, you're in the largest group, not an unusual one, and the two behaviors tend to track each other in severity.
There's a practical reason to care about this list. Treating one condition and ignoring the rest tends to leave both in place. If the ADHD overlap sounds like you, that's worth raising with whoever you see, because it changes what a treatment plan should look like.
Treatment, In the Order the Evidence Supports
There's a gap between what the trials say works and what people are actually offered first, and it's worth closing before you start.
Behavior therapy is first line, and it isn't close
A 2020 meta-analysis pooled 24 randomized controlled trials covering 857 participants. Behavior therapy with habit-reversal components produced a large benefit against control conditions, with a standardized mean difference of −1.22 (95% CI −1.71 to −0.73). No medication came close: clomipramine −0.71, N-acetylcysteine −0.75, olanzapine −0.94.
Habit reversal training (HRT) is the core method. It has four parts: awareness training (learning to catch the behavior, including the automatic kind), competing response training (doing something physically incompatible with pulling when the urge lands, such as clenching a fist), stimulus control (changing the environment that cues pulling), and social support. If you want the mechanics rather than the summary, the full walkthrough of HRT for hair pulling goes component by component.
The Comprehensive Behavioral model (ComB) extends this by mapping five components of your particular pulling: sensory, cognitive, affective, motoric, and place. It exists because pulling almost never has one cause, and two people with the same diagnosis often need different interventions.
ACT and DBT are added to HRT rather than replacing it. Acceptance and Commitment Therapy has randomized support as an HRT add-on, with reductions in pulling associated with improved tolerance of uncomfortable internal experiences. Dialectical Behavior Therapy has also been shown to help when combined with HRT. Both target focused pulling, which is the kind HRT alone handles least well.
The order people actually get
The Trichotillomania Impact Project found that among its 1,697 respondents, pharmacotherapy was the most commonly received treatment, followed by behavior therapy. Treatment in general was perceived as relatively ineffective.
Medication, accurately
No medication is FDA-approved for trichotillomania. Several have real randomized evidence.
N-acetylcysteine (NAC), an over-the-counter glutamate modulator, was tested in a 12-week double-blind trial of 50 adults at 1,200 to 2,400 mg a day. 56% were much or very much improved versus 16% on placebo. Improvement didn't appear until around week 9, which matters: people frequently abandon it at week 4 and conclude it doesn't work. A later trial in children and adolescents did not find a benefit.
Memantine produced the strongest result to date. In a 2023 double-blind placebo-controlled trial of 100 people with trichotillomania, skin picking disorder, or both, 60.5% on memantine were much or very much improved versus 8.3% on placebo, with a number-needed-to-treat of 1.9. No serious adverse events occurred; two participants withdrew because of dizziness. It's prescription-only and needs replication in a trichotillomania-only sample.
Clomipramine has modest randomized support. Olanzapine has a single positive trial. SSRIs are the most commonly prescribed and the least supported: across trials they show no reliable benefit for hair pulling itself, and the NHS notes that antidepressants are not usually prescribed for it. They may still be appropriate if you also have depression or an anxiety disorder that needs treating in its own right.
What recovery actually means
MGH's trichotillomania clinic puts it plainly: the goal of treatment is symptom management rather than cure. Relapse is common, medications can lose effect over time, and the long-term commitment that behavior therapy asks for is genuinely hard.
That's not a reason to skip treatment. It's a reason to measure success in reduced frequency, faster recovery after a slip, and getting parts of your life back, rather than in a permanent end to every urge. People who expect the second one tend to quit when the first one is already happening.
What You Can Do This Week
Three things are available before you see anyone.
Start noticing. Awareness training is the first component of the first-line treatment for a reason: automatic pulling can't be interrupted until you can catch it. Logging when you pull, where you were, what you were doing, and what you felt beforehand is not busywork. It's the raw material every behavioral treatment runs on, and it's the part you can do without a therapist.
Make pulling physically harder in the specific places you pull. The NHS self-help list is practical and specific: squeeze a stress ball, clench your fist and tighten the muscles in that arm, use a fidget toy, wear a bandana or a tight-fitting hat such as a beanie, put adhesive bandages on your fingertips, take a bath to ease the anxiety, do deep breathing until the urge passes, cut your hair short.
The point of a competing response isn't distraction. It's occupying the hand for the sixty seconds the urge needs. There's more on building one that sticks in the practical guide to stopping hair pulling.
Start with the part you can do today
SkinAware logs pulls and resisted urges, teaches habit reversal training module by module, and shows you the patterns underneath. Built for hair pulling, skin picking, and nail biting.
Frequently Asked Questions
No, though they're related and sit in the same DSM-5 chapter. OCD compulsions are performed to neutralize an intrusive thought or prevent a feared outcome. Hair pulling isn't driven by that structure, and many people find it pleasurable or relieving in the moment, which is unusual for OCD compulsions. People with OCD are more likely than average to develop a body-focused repetitive behavior.
No. The TLC Foundation for BFRBs states this directly. The intent isn't to injure or punish yourself, and the mechanism is closer to grooming than to self-injury. Some people experience both, and both deserve support, but they're different things.
Often, yes, especially where pulling stops early. But repeated pulling can cause irreversible damage to hair growth and hair quality in some people, and regrowth isn't guaranteed. The most useful thing anyone can do for regrowth is reduce the ongoing damage.
Usually by a mental health professional comparing your experience against the five DSM-5 criteria. A dermatologist is often involved first to rule out other causes of hair loss, such as alopecia areata or telogen effluvium. Tests are rarely needed, though dermoscopy can distinguish trichotillomania by showing decreased hair density, short vellus hairs, and broken hairs of differing lengths. If a doctor suspects swallowed hair, imaging or blood tests may be ordered.
Onset in late childhood or early puberty is the typical pattern, and it occurs about equally in boys and girls at that age. Hair pulling in infants is developmentally normal and usually resolves. In older children and teenagers it's more likely to persist and to benefit from treatment. Behavior therapy is first-line for young people as well as adults, and N-acetylcysteine specifically did not show a benefit in a pediatric trial.
A 2022 meta-analysis of 30 studies covering 38,526 people found a prevalence of 1.14% for trichotillomania and 8.84% for hair-pulling behavior of any kind. The DSM-5-TR gives a 12-month prevalence of 1 to 2% of the population.
Some people achieve full remission without relapse. More commonly it waxes and wanes, and treatment changes the size of the waves. Behavior therapy has the largest effect sizes in the literature, and effects were larger in trials with more therapy hours, which suggests that sticking with it matters.
Because it's hidden almost by definition. People with trichotillomania go to considerable effort to conceal it from family, friends, and healthcare providers, and it's under-recognized even by clinicians. A 1995 survey of hair pullers found that 58% never sought treatment at all. That figure is old, but the pattern behind it hasn't gone anywhere.
Where to Get Help
The International OCD Foundation (iocdf.org) now carries the BFRB work the TLC Foundation built, including its therapist directory, educational resources, a BFRB special interest group, and BFRB programming at the annual conference. TLC's own site, bfrb.org, stays online only through Summer 2026.
Psychology Today's therapist finder lets you filter by specialty. Look for trichotillomania, BFRBs, habit reversal, or habit disorders specifically. A general CBT therapist may not have trained in HRT.
Your GP or primary care provider is a reasonable first stop, particularly for ruling out other causes of hair loss and for a referral. Using the clinical terms helps: trichotillomania, hair pulling disorder, habit reversal training.
A dermatologist is worth seeing if there's any question about what's causing the hair loss.