Kids chew on their hair for a range of reasons, from simple habit and boredom to sensory-seeking behavior, anxiety, or nutritional deficiencies. In most cases, it’s a self-soothing mechanism similar to thumb-sucking or nail-biting. Understanding the root cause is the key to helping your child stop.
It’s Often a Self-Soothing Habit
The most common explanation is straightforward: chewing on hair feels calming. Children naturally develop oral habits to regulate their emotions, and hair happens to be constantly available. Just as some kids bite their nails or suck their thumbs, others discover that chewing on a strand of hair helps them feel settled when they’re bored, tired, or mildly stressed. For many children, this is a phase that fades on its own as they develop other coping strategies.
The behavior tends to show up during passive moments: watching TV, riding in the car, sitting in class, or falling asleep. If your child only chews their hair occasionally and doesn’t seem distressed, it likely falls into this category.
Sensory Seeking and the Need for Oral Input
Some children have a stronger-than-average need for sensory input through their mouth. Chewing, sucking, and biting provide proprioceptive feedback to the jaw and facial muscles, which helps regulate the nervous system. For these kids, oral input isn’t just soothing; it’s something their brain actively craves to feel calm, focused, or safe.
Children with sensory processing differences are especially likely to seek out this kind of input. They may chew on hair, shirt collars, pencils, or anything within reach. The chewing isn’t random. It serves a real neurological function, giving the brain the stimulation it needs to stay organized. If your child chews on many different objects (not just hair), sensory seeking is a likely explanation, and an occupational therapist can help identify whether your child’s sensory needs are being met.
Anxiety, ADHD, and Emotional Regulation
Hair chewing frequently shows up alongside anxiety and ADHD. Children with ADHD often engage in repetitive self-stimulatory behaviors, sometimes called “stimming,” as a way to boost concentration or process emotions. Playing with hair, grinding teeth, biting the inside of the mouth, and picking at skin are all common in this group. The behavior can be largely unconscious, appearing when a child is trying to sit still, pay attention, or manage frustration.
For anxious children, the mechanism is similar but the trigger is different. Hair chewing becomes a way to self-soothe and avoid becoming overwhelmed during stressful situations, whether that’s a test at school, a social interaction, or general worry. The repetitive motion creates a sense of predictability and comfort. If your child’s hair chewing intensifies during transitions, homework, social settings, or other stressful moments, anxiety or attention difficulties may be driving it.
Nutritional Deficiencies and Pica
Sometimes hair chewing is the body’s signal that something is missing nutritionally. Pica, the craving and consumption of non-food items, is linked to deficiencies in iron, zinc, and calcium. Iron deficiency (anemia) is one of the most common triggers. When children are low in these minerals, they may develop unusual oral behaviors including chewing or eating hair, dirt, chalk, or ice.
If your child is actually swallowing the hair rather than just chewing on it, or if they’re also drawn to eating other non-food items, a blood test to check for nutritional deficiencies is a reasonable step. Correcting the deficiency often reduces or eliminates the behavior.
When Hair Chewing Becomes Hair Eating
There’s an important distinction between chewing on hair and actually eating it. Trichophagia is a recognized mental health condition in which a person compulsively eats hair. It often occurs alongside trichotillomania, a condition where a person repeatedly pulls their hair out. About 1% of the general population is affected by trichotillomania, and it typically begins in childhood.
The physical danger of swallowing hair is real. Hair cannot be digested, so over time it can accumulate in the stomach and form a mass called a trichobezoar. In severe cases, this leads to a condition called Rapunzel syndrome, where the hairball extends from the stomach into the intestines. Warning signs include belly pain or cramping, bloating, constipation, nausea, vomiting, unexplained weight loss, bad breath, or feeling full after eating very little. Large hairballs can cause bowel obstruction, tears in the stomach lining, malnutrition, and other serious complications that require surgical removal.
If your child is pulling out and eating hair, or if you notice any of these digestive symptoms alongside hair chewing, this warrants a medical evaluation rather than a wait-and-see approach.
How to Help Your Child Stop
The right approach depends on why your child is chewing. For a simple habit, the most effective strategy is replacement. Give the mouth something else to do. Silicone chew necklaces and chewable pencil toppers are designed specifically for kids who need oral input. Crunchy snacks like carrots, pretzels, or apple slices can also satisfy the craving during homework or screen time. For younger children, keeping hair in a ponytail or braid removes the temptation entirely.
For more persistent or compulsive hair chewing, a behavioral approach called habit reversal training can be very effective. It works in stages. First, the child learns to notice when the behavior is happening, since many kids genuinely don’t realize they’re doing it. Then they practice a “competing response,” a substitute action that makes it physically impossible to chew their hair. This could be clasping their hands together, squeezing a stress ball, or pressing their tongue to the roof of their mouth. The replacement behavior needs to be something they can do anywhere without drawing attention.
Relaxation techniques are often part of the process too, especially when anxiety is a factor. Deep breathing, mindfulness exercises, or guided imagery can reduce the underlying tension that drives the chewing. For children with ADHD or significant anxiety, addressing those conditions directly, whether through therapy, environmental changes, or other supports, often reduces the hair chewing as a side effect.
What doesn’t help: punishing, shaming, or constantly drawing attention to the behavior. Most children aren’t choosing to chew their hair. Calling it out repeatedly can increase anxiety and make the habit worse. A calm, collaborative approach works better. Help your child become aware of the behavior without judgment, and work together to find alternatives that meet the same underlying need.