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A minority of individuals with trichotillomania (hair-pulling disorder) eat the hair they pull.

Repeated hair ingestion can lead to trichobezoars, a rare but serious medical complication.

Symptoms may include stomach pain, nausea, early fullness, or unexplained weight loss.

Evidence-based treatment can address hair pulling, trichophagia, and prevent recurrence.

Parents of children with trichotillomania (hair-pulling disorder) often worry about visible hair loss, teasing at school, or how to help their child stop. But there is a lesser-known complication of trichotillomania that parents and clinicians should also understand: trichobezoars, a serious medical condition that can develop when pulled hair is swallowed repeatedly over time.

Trichobezoars are rare; approximately 30 percent of those with TTM engage in swallowing of the hair and only 1 percent of those individuals develop a trichobezoar that requires surgical extraction. Thus, awareness—not alarm—is key. Understanding what they are and how they develop can help families recognize warning signs and seek care early, if needed.

What Is a Trichobezoar?

A trichobezoar is a mass of hair that accumulates in the stomach after hair has been swallowed (a behavior known as trichophagia).

Human hair cannot be digested. When swallowed repeatedly, strands of hair can collect in the stomach and gradually become compacted into a dense mass. In some cases, the hairball can grow large enough to extend from the stomach into the intestines, a rare condition sometimes referred to as Rapunzel syndrome. Trichobezoars require medical treatment and are often discovered only after symptoms develop.

Importantly, not everyone with hair pulling swallows hair, and the majority of people with trichotillomania never develop a trichobezoar. However, for individuals who do engage in trichophagia, the risk increases over time.

Why Do Some People Swallow Hair?

For some individuals with trichotillomania, pulling hair is only part of the behavioral sequence. They may also:

Run it across the lips or face

Bite or chew the hair root

Swallow strands of hair

These behaviors may occur inside or outside of one’s awareness and may provide sensory satisfaction or tension relief. Children may not even realize they are swallowing hair, or they may feel embarrassed to mention it.

Because of this, parents and clinicians sometimes remain unaware until symptoms appear.

Signs and Symptoms Parents Should Know

Trichobezoars often develop slowly. Early symptoms may be subtle and can easily be mistaken for other gastrointestinal problems.

Possible warning signs include:

Persistent stomach pain

Feeling full quickly when eating

Unexplained weight loss

A firm mass felt in the abdomen

Changes in bowel habits

In more severe cases, intestinal obstruction can occur, which requires urgent medical attention.

If a child with hair pulling is known to swallow hair and begins experiencing persistent gastrointestinal symptoms, it is important to consult a physician promptly.

Diagnosis and Treatment

Doctors typically diagnose trichobezoars using imaging studies such as ultrasound, CT scan, or endoscopy.

What Are Body-Focused Repetitive Behaviors?

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Because hair masses are tightly compacted, they usually cannot be dissolved or passed naturally. Treatment often requires removal through endoscopy or surgery, depending on the size and location of the bezoar.

Medical treatment addresses the physical complication, but psychological treatment remains essential to prevent recurrence.

Addressing the Behavior Behind the Medical Risk

When trichophagia is present, treatment focuses not only on hair pulling but also on the behavioral sequence surrounding the hair after it is pulled.

Evidence-based behavioral approaches may include:

Increasing awareness of pulling and hair-handling behaviors

Identifying sensations, emotions, thoughts, and/or situations that serve as triggers

Changing environmental factors that lead to the behavior

Developing competing responses and behavioral redirection strategies

Supporting emotional regulation skills

Developing cognitive flexibility skills

Reducing shame and secrecy so children feel safe discussing the behavior

An integrative approach, one that considers the child’s emotional, sensory, and developmental needs, can be particularly helpful.

Talking to Children About Trichophagia

If parents learn that their child sometimes eats hair, the instinct may be to react with alarm or correction. But intense reactions can increase shame and make children more likely to hide the behavior.

Instead, aim for calm curiosity:

“I’ve noticed sometimes the hair goes in your mouth after you pull. Can you tell me what that feels like?”

“We can work together to help your body find safer ways to get what it needs.”

Children do best when they feel supported rather than monitored.

Trichobezoars are rare but important for families and clinicians to be aware of. Most children with hair pulling will never develop one, but understanding the possibility helps ensure early recognition if trichophagia is present.

Just as importantly, awareness opens the door for compassionate conversations about the full range of behaviors that can accompany hair pulling. With supportive, evidence-based care, children can learn healthier ways to regulate urges and feel more comfortable in their own bodies,without fear or shame guiding the process.

Frey, A. S., McKee, M., King, R. A., & Martin, A. (2005). Hair apparent: Rapunzel syndrome. The American journal of psychiatry, 162(2), 242–248. https://doi.org/10.1176/appi.ajp.162.2.242

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