Trichotillomania (Hair-Pulling Disorder)

What Is Trichotillomania (Hair-Pulling Disorder)?

Trichotillomania belongs to the repetitive behaviours focused on the body. One can look for hairs with a specific texture, twist them, or examine them after pulling. Others pull hair without full awareness when reading, working or watching TV. Episodes may be triggered by boredom, stress, tension, or a sensory sensation, but there is no one pattern for everyone. The appearance may be thinning in places, uneven hairs of different lengths or loss of eyebrows and eyelashes.

Key Features and Signs

The behaviour and its consequences can appear in several different ways:

• Recurrent hair pulling from one or more areas, with visible thinning or loss.
• Search for specific hair based on length, thickness, texture, or a feeling that it's "not right."
• Pulling with full attention and ritual preparation or automatically during sedentary activities.
• Repeated attempts to stop or reduce pulling, including covering the affected area, changing position or limiting access to tools, without consistent success.
• Concealing thinning with a hairstyle, hat, wig, makeup, or avoiding certain activities.
• Playing with pulled hair, rubbing it against the lips or, in some people, biting and swallowing it.
• Shame, isolation, falling behind at school or work, and avoidance of hair salons, medical examinations, or intimacy.

How It Is Diagnosed

The evaluation looks at the pulling pattern and hair loss, as well as dermatological, developmental and other psychological explanations.

• There is recurrent pulling out of one's hair, resulting in hair loss.
• The person has made repeated attempts to reduce or stop the pulling.
• The behaviour causes clinically significant distress or impairment in social, work, school, or other important functioning.
• The hair pulling or hair loss is not attributable to another medical or dermatological condition.
• The behaviour is not better explained by another mental disorder, such as attempts to improve a perceived defect in Body Dysmorphic Disorder.

How It Can Affect Daily Life

Trying to hide can take time, money and constant preparation. Swimming, exercise, wind, strong lighting or intimacy may be avoided for fear of showing the thinning. Pulling disrupts concentration and sleep and can cause skin irritation or infection. Appearance comments and criticism often reinforce shame and secrecy. A supportive attitude is to recognize the difficulty, reduce triggers, and seek specific treatment.

Causes and Risk Factors

No single cause has been identified. Habit learning, sensory rewards, ways of regulating emotional tension or boredom, and genetic vulnerability may contribute. Excoriation (Skin-Picking) Disorder, obsessive-compulsive disorder (OCD), anxiety or depression often co-occur, without it being certain that one condition causes the other. The behaviour can start at different ages and change over time. Estimates by sex differ between clinical samples and the general population.

Similar or Co-occurring Conditions

Examination of the skin and the motive of the pulling help distinguish:

• Alopecia areata, fungal, hormonal or other dermatological and medical causes can cause hair loss without pulling.
• In Body Dysmorphic Disorder, hair removal is performed primarily to correct a perceived defect in appearance.
• In stereotypic movements or in certain neurodevelopmental conditions, hair pulling may be part of a larger repetitive pattern.
• Self-injurious behaviour with a different function may occur in intellectual disability; modern, non-stigmatizing terminology and individualised assessment are used.
• Obsessive-compulsive disorder includes obsessions and compulsions, whereas hair-pulling is usually not done to neutralise an obsession.

Treatment and Support

Treatment focuses on awareness, changing the environment and safe alternative movements.

• Cognitive-behavioural therapy with habit reversal training is a key option: it detects early signals and teaches a movement incompatible with pulling.
• Recording time, location, activity, emotion, and area helps distinguish focused from automatic pulling.
• Stimulus control may include changing lighting or position, covering fingers, safe objects that keep the hands occupied, or limiting access to tools, depending on the pattern.
• The family supports the use of skills and avoids constant scrutiny, threats or comments about appearance.
• Some drugs or supplements have been studied, but they are not a solution for everyone and should only be considered by a doctor along with benefits, risks and co-occurring conditions.

When to Seek Help

Seek evaluation when there is obvious hair loss, repeated failed attempts to stop, sores, or limitation of daily activities. Dermatologic evaluation helps rule out other causes and treat lesions. Tell the practitioner if there is hair chewing or swallowing, abdominal pain, vomiting, unexplained weight loss, or difficulty eating, as immediate medical investigation may be needed.

Frequently Asked Questions

Is trichotillomania one of the impulse control disorders?

Not in DSM-5-TR. It is classified in obsessive-compulsive and related disorders as a distinct repetitive behaviour focused on the body.

Are tension before pulling and relief afterwards required for diagnosis?

No. This sequence may occur, but is not required. Many people pull hair almost automatically and realize it later.

Habit reversal training builds awareness of early signals and teaches a safe competing response that is incompatible with hair pulling.

It is a structured behavioural method that increases awareness of early signals, changes triggers and teaches a safe competitive movement.

Sources

1. Merck Manual: Trichotillomania
2. NHS: Trichotillomania