Hair Loss in Children Causes: The Six Main Ones
Finding a bald patch on your child's head is frightening. Here is what it is most likely to be.
The main hair loss in children causes are scalp ringworm, alopecia areata, hair pulling, telogen effluvium after an illness or shock, traction from tight hairstyles, and nutritional deficiency. Most are temporary and hair grows back once the cause is dealt with. Scalp ringworm is an infection that needs a prescription medicine from a GP and will not clear with shampoo, so any patch with broken stubble, flaking or redness should be seen promptly.
Key Takeaways
- Take your child to the GP. Several of these look alike, they need very different care, and one of them is contagious.
- Scalp ringworm is the one not to sit on. It is a fungal infection, it spreads between children, and it needs a prescription medicine taken by mouth. No shampoo clears it.
- Alopecia areata produces smooth, completely bare patches. Hair pulling produces irregular patches with stubble of mixed lengths.
- A heavy shed two to three months after a fever, an operation or a big shock is usually telogen effluvium, and it settles on its own.
- Tight braids, buns and ponytails worn constantly cause traction loss at the hairline, which becomes permanent if it goes on for years.
- Do not use adult hair growth products, supplements or scalp serums on a child. None of them are formulated or intended for children.
Which hair loss in children causes are most common?
Six explanations account for the overwhelming majority of cases. The table sorts them by what a parent can actually see, which is the fastest way to narrow things down before an appointment.
| Cause | What the patch looks like | What happens next |
|---|---|---|
| Scalp ringworm (tinea capitis) | Scaly, flaky or red skin with broken-off stubble, sometimes a boggy swollen area. Often itchy. | Needs a GP. It is a fungal infection requiring a prescription medicine taken by mouth, usually for several weeks. Topical products alone do not clear it. |
| Alopecia areata | One or more completely smooth, hairless patches with a normal-looking scalp underneath. No scaling, no stubble. | An autoimmune condition. Hair often returns on its own within a year, though it can recur. A GP can refer on if it is extensive. |
| Hair pulling | Irregular, oddly shaped patches with hairs of many different lengths and bristly stubble. Often one-sided. | A body-focused repetitive behaviour. In young children it often fades by itself. Persisting into adolescence responds well to behavioural therapy. |
| Telogen effluvium | No patches at all. Even, diffuse thinning all over, with lots of hair coming out when brushing or washing. | A delayed reaction to a fever, operation, accident or major stress two to three months earlier. Almost always resolves without intervention. |
| Traction | Thinning along the hairline, at the temples or wherever a style pulls hardest. Sometimes small bumps. | Caused by tight braids, buns, ponytails or extensions. Reversible early. Prolonged tension over years can permanently damage the follicles. |
| Nutritional deficiency | Diffuse thinning, hair that feels dry or brittle, often alongside tiredness or pallor. | Iron, zinc and protein are the usual suspects. A GP can arrange a blood test. Do not start supplements on a guess. |
The one that needs an appointment this week
If there is any scaling, flaking, redness, swelling or broken stubble, treat it as possible scalp ringworm and get it seen. It spreads between children through shared hats, combs, pillows and headrests, and left alone it can cause a severe inflammatory reaction that scars the scalp permanently.
How do you tell alopecia areata and hair pulling apart?
These two are the hair loss in children causes confused most often, and the distinction changes what happens next completely.
Alopecia areata produces a patch that is genuinely, completely bare. Run a finger over it and the skin is smooth, often with a faint peachy tone, and the outline is usually round or oval. It is an autoimmune condition in which the immune system turns on the hair follicle, and it is nobody's fault and nothing to do with anything your child did.
Hair pulling produces something that looks superficially similar but feels quite different. The outline is irregular, sometimes almost angular. Inside the patch there are hairs at many different lengths, and short broken stubble that catches under a fingertip, because some hairs were pulled last week and others a month ago. It often favours the side of the dominant hand.
Our detailed guides to alopecia areata and to hair pulling and what genuinely helps go into each properly. Neither replaces having a GP look at it.
Why does hair fall out months after an illness?
Telogen effluvium is the most misunderstood of the hair loss in children causes, because the timing hides the trigger completely.
Hair grows in a cycle. At any moment most follicles are in a growing phase and a minority are resting. A significant physical shock, such as a high fever, an operation, a serious infection, an accident or a period of intense emotional stress, can push an unusually large number of follicles into the resting phase all at once. Those hairs do not fall immediately. They sit there for roughly two to three months, then release together.
The result is a parent noticing a frightening amount of hair on the pillow and in the brush, long after the illness that caused it has been forgotten. There are no patches. The thinning is even and all over.
It resolves on its own, usually within three to six months of the shed starting, and no intervention speeds it up. Our explanation of the hair growth cycle covers the timings, and stress-related hair loss covers the same mechanism in adults.
Which hairstyles cause hair loss in children?
Traction loss is the one cause on this list that is entirely preventable, and it is worth taking seriously because prolonged traction is one of the few childhood causes that can become permanent.
The mechanism is simple mechanical tension. A style that pulls constantly on the same follicles for hours every day, over months and years, eventually damages them. The signs to watch for are thinning at the temples and along the front hairline, small bumps around the hair roots, and a child complaining that a style hurts or that their scalp is sore.
- If it hurts, it is too tight. A style should never be painful to put in or sleep in. Discomfort is the warning sign, not a sign it will last well.
- Rotate styles. Do not put the same tension on the same spot week after week.
- Give the hair breaks. Loose or down at home, at weekends and overnight.
- Go easy on heat and chemical processing. Both weaken the fibre and compound the tension.
- Take extensions and weaves out on schedule. Leaving them in longer adds weight and tension.
Caught early, traction loss recovers fully once the tension stops.
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Can diet cause hair loss in children?
It can, though diet sits lower down the list of hair loss in children causes than the internet suggests, and it is the one where guessing does the most harm.
Iron deficiency is the most frequent culprit, and it is genuinely common in children, particularly fussy eaters, vegetarians and teenage girls. Low zinc and inadequate protein intake can also contribute. Hair is metabolically expensive and it is one of the first things the body deprioritises when supply is short.
The important part is this: do not start a supplement on a hunch. Iron in excess is toxic to children and iron overdose is a genuine cause of serious poisoning in young children. Zinc in excess interferes with copper absorption. If you suspect a nutritional cause, ask the GP for a blood test and act on the result rather than on a guess. The NHS guidance on vitamins and minerals sets out what children actually need.
What can you safely do at home?
Very little needs doing, and that is genuinely the right answer rather than a cop-out. Once a GP has established which of the hair loss in children causes applies, the home role is gentle handling and emotional support.
- Handle the hair kindly. Wide-tooth comb, detangle from the ends upwards, no tight styles, pat dry rather than rubbing.
- Keep washing normal. A mild children's shampoo, as often as usual. Washing does not make hair fall out, and stopping does not save any.
- Feed them properly. A varied diet with adequate iron and protein. Food, not supplements.
- Do not use adult products. Growth serums, scalp actives and hair supplements are formulated for adults and are not appropriate for a child, whatever the marketing says.
- Mind the social side. Visible hair loss is hard at school. Talk to the teacher, agree with your child what they want said, and let them decide about hats or headscarves themselves.
- Do not make it the topic of every conversation. Children take their cue from how worried the adults look.
Watermans makes cosmetic hair care for adults. We are not going to recommend any of it for a child with hair loss, because that is a matter for a GP and not for a shampoo.
When should you see a GP?
Effectively always, for a child. Hair loss in an adult is often something to watch. In a child it is worth having looked at, and urgently so in these situations.
- Any scaling, flaking, redness, crusting or swelling on the scalp.
- Broken-off stubble within a patch, or a boggy, tender lump.
- The scalp is sore, weeping or looks infected.
- Hair loss alongside tiredness, weight change, pallor or being generally unwell.
- Eyebrows or eyelashes are affected as well.
- Loss is spreading quickly or is extensive.
- Your child is distressed by it, whatever the cause turns out to be.
Please note: Watermans products are 100% cosmetic and do not treat medical hair loss. Individual results may vary.
Frequently asked questions
What are the most common hair loss in children causes?
Scalp ringworm, alopecia areata, hair pulling, telogen effluvium after an illness or shock, traction from tight hairstyles, and nutritional deficiency, most often low iron. Between them these account for the great majority of cases.
Should I take my child to the doctor for hair loss?
Yes. Several of the causes look alike to an untrained eye, they need completely different care, and one of them is a contagious infection that will not clear on its own. A GP appointment is the right first step in almost every case.
Does children's hair grow back after hair loss?
Usually, yes. Telogen effluvium, hair pulling and early traction loss all recover fully once the cause stops. Alopecia areata often recovers within a year. The exceptions are severe untreated scalp ringworm and many years of tight styling, both of which can scar follicles permanently.
Is scalp ringworm serious?
It needs prompt attention. It is a fungal infection of the hair shafts that spreads between children through shared hats, combs and pillows, it requires a prescription medicine taken by mouth, and left alone it can cause a severe inflammatory reaction that scars the scalp.
Why does my child have a smooth bald patch?
A completely smooth, hairless patch with normal-looking skin and no stubble is most typical of alopecia areata. If there is bristly stubble of mixed lengths, hair pulling is more likely, and if there is scaling or redness, think scalp ringworm. A GP can tell them apart.
Can I use adult hair growth products on my child?
No. Adult growth serums, scalp actives and hair supplements are neither formulated nor intended for children. Whatever the underlying cause turns out to be, it is a question for a GP rather than something to solve from a bathroom cabinet.
Can stress cause hair loss in a child?
Yes, through telogen effluvium. A bereavement, a house move, exam pressure or bullying can push follicles into the resting phase together, with the shed appearing two to three months later. It settles on its own once the stress passes.
Should I give my child iron or vitamin supplements?
Not without a blood test. Iron deficiency is a real cause of hair loss in children, but iron in excess is toxic and iron overdose is a serious cause of poisoning in young children. Ask the GP to check, then act on the result.
The bottom line
The hair loss in children causes worth knowing come down to six, and a parent can narrow them considerably just by looking closely at the patch: smooth and bare points to alopecia areata, irregular with stubble points to pulling, and scaly or red points to ringworm. Diffuse thinning with no patch at all usually means a shed following an illness a couple of months earlier.
Whichever it looks like, the next step is the same. Book in with your GP, handle the hair gently in the meantime, and keep adult products well out of it. Most of these resolve, and the ones that do not tend to be the ones that waited too long.
