Hair Loss in Children: Causes and When to See a Doctor
Noticing your child losing hair is understandably worrying, but the reassuring news is that hair loss in children is more common than most parents realise, and it is very often treatable once the cause is known. The causes range from a fungal scalp infection (ringworm) and alopecia areata to nutritional gaps, stress and hair that is simply pulled too tight. The single most important step is to see your GP or paediatrician for a proper diagnosis, because the right treatment depends entirely on the cause.
Key takeaways
- Hair loss in children is common and usually treatable once the cause is identified.
- Causes include ringworm (tinea capitis), alopecia areata, hair-pulling (trichotillomania), stress-related shedding and nutritional gaps.
- Tight hairstyles, friction and heat styling can also cause hair loss and are easy to fix.
- Always see a GP or paediatrician for a diagnosis, some causes need prescription treatment.
- Gentle handling and a kind, reassuring conversation with your child both help.
How common is hair loss in children?
More common than you might think. A child's hair follows the same predictable cycle as an adult's: each strand grows for two to six months, rests for around three months in the telogen phase, then sheds so a new strand can grow. Shedding some hair every day is completely normal.
What is not normal is a sudden increase in shedding, bald patches, or thinning that keeps getting worse. That is your cue to look a little closer and, importantly, to get it checked.
What are the medical causes of hair loss in children?
These are the causes that need a doctor's input. The list is common but not exhaustive, so any concern is worth a conversation with your paediatrician.
1. Ringworm of the scalp (tinea capitis)
Despite the name, this is a fungal infection, not a worm, and it is one of the most common causes of hair loss in children. It usually shows up as round, scaly, itchy bald patches, sometimes with black dots where hairs have broken. It is contagious and needs prescription antifungal treatment from a doctor, so it is important to have it checked rather than treated at home.
2. Alopecia areata
An autoimmune condition in which the immune system mistakenly targets hair follicles, causing smooth, round bald patches. It comes in degrees: alopecia areata (patches), alopecia totalis (all scalp hair) and alopecia universalis (all body hair). Around 1 in 1,000 children experiences alopecia areata. A doctor can diagnose it by examining the scalp and hair, and hair often regrows, though the course varies.
3. Trichotillomania (hair-pulling)
This is a compulsion to pull out one's own hair, sometimes as a release of tension and sometimes without the child realising. It leaves patches of broken hairs of different lengths. Hair usually regrows once the pulling stops, and support such as cognitive behavioural therapy can help address the underlying cause.
4. Telogen effluvium
Here, a trigger pushes far more follicles than usual into the resting (telogen) phase, so instead of shedding around 100 hairs a day, a child may shed noticeably more, with diffuse thinning. Common triggers include a very high fever, surgery, a severe injury or significant emotional stress. It typically recovers on its own over several months once the trigger has passed. You can read more in our guide to what causes telogen effluvium.
5. Nutritional deficiencies
As in adults, low levels of certain nutrients can contribute to hair loss, including iron, zinc, niacin, biotin and protein. Interestingly, too much vitamin A can also play a part. A balanced diet usually covers this, and a GP can test for and address any genuine deficiency, never start supplements for a child without medical advice.
6. Thyroid and other health conditions
An underactive or overactive thyroid, and some other health conditions, can affect hair. If your child's hair loss comes with other symptoms such as tiredness, weight changes or a poor appetite, mention this to your doctor.
What are the non-medical causes?
These are usually harmless and easy to put right at home:
- Newborn hair loss: in the first six months, most babies shed the fine hair they were born with as their mature hair comes through, this is completely normal.
- Friction hair loss: babies who rub the back of their head against a mattress or pram can wear a bald patch there, which fills in as they start sitting up.
- Tight hairstyles (traction): tight ponytails, buns and braids pull on the roots and, over time, can cause hair loss around the hairline. Looser styles solve it.
- Heat and rough handling: blow-drying, straightening and vigorous brushing can break young, fine hair.
Causes of children's hair loss at a glance
| Cause | Typical signs | What to do |
|---|---|---|
| Ringworm (tinea capitis) | Scaly, itchy patches, black dots | See a doctor, needs antifungal treatment |
| Alopecia areata | Smooth, round bald patches | See a doctor for diagnosis |
| Trichotillomania | Broken hairs of uneven length | Gentle support, speak to a GP |
| Telogen effluvium | Diffuse thinning after a trigger | Usually self-resolves, check if unsure |
| Tight styles / friction | Thinning at edges or one patch | Loosen styles, reduce friction |
How to gently care for your child's hair
Alongside whatever your doctor advises, gentle everyday habits protect the hair your child has and keep their scalp comfortable:
- Choose loose styles over tight ponytails and braids to avoid pulling on the roots.
- Use a soft brush or wide-tooth comb and detangle gently, from the ends upwards.
- Wash with a mild, gentle shampoo and lukewarm water, and go easy on heat styling.
- Encourage a balanced diet rich in iron, zinc and protein for overall healthy hair.
- Keep hairbrushes, combs and hats to your child only if ringworm is suspected, as it is contagious.
These are simple, kind habits, not treatments. If a medical cause is behind the hair loss, your doctor's plan is what will address it.
Supporting your child through hair loss
Hair loss can affect a child's confidence, so talk to them gently and honestly. Explain what is happening in words they understand, reassure them that it is not their fault, and let them know it is being looked after. For visible or lasting hair loss, soft hats, headscarves and a supportive chat with their school can all help them feel comfortable. Your calm reassurance matters more than anything.
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Frequently asked questions
Is hair loss in children normal?
Some daily shedding is normal, and newborns shedding their first hair is normal too. But bald patches, a scaly scalp or worsening thinning should always be checked by a doctor.
What is the most common cause of hair loss in children?
Ringworm of the scalp (tinea capitis) and alopecia areata are among the most common medical causes, while tight hairstyles are a frequent non-medical cause.
Will my child's hair grow back?
In many cases yes, particularly with ringworm, telogen effluvium, trichotillomania and tight-style hair loss once the cause is addressed. Your doctor can advise on your child's specific situation.
Should I give my child hair growth supplements?
Never start supplements for a child without medical advice. Too much of some nutrients (such as vitamin A) can actually contribute to hair loss. Ask your GP first.
When should I take my child to the doctor about hair loss?
Promptly, if there are bald patches, redness or scaling, broken hairs, sudden or spreading loss, or if your child is distressed by it.
Can stress cause hair loss in children?
Yes. Significant stress or a shock to the body (illness, high fever, surgery) can trigger telogen effluvium, which usually recovers over several months.
Is ringworm of the scalp serious?
It is treatable but does need prescription antifungal medicine, and it is contagious, so see a doctor rather than treating it at home.
Can tight ponytails cause hair loss?
Yes, repeatedly tight styles pull on the roots and can cause hair loss at the hairline over time. Looser styles usually resolve it.
Hair loss in children is worrying to see, but it is common and usually very treatable. Watch for the warning signs, keep everyday care gentle, reassure your child, and let your GP or paediatrician guide the diagnosis and treatment. For related reading, see our guide on what causes telogen effluvium.
