Your child won’t stop scratching. You part the hair under a lamp, something moves, and the dog has been scratching all week too. So the first question isn’t what to do about it. The first question is what it even is.
Here’s the short version. If it lives on the head and stays on the head, it’s head lice. Fleas will bite a scalp, but they don’t move in. Bed bugs never lay eggs in hair at all. And the fastest way to separate the three isn’t the bug itself, because a bug that small and that fast can’t be read. It’s the eggs.
A louse is about the size of a sesame seed. Nobody identifies one by counting its legs. So use the thing that holds still.
| What to check. | Head lice. | Fleas. | Bed bugs. |
|---|---|---|---|
| Does it live on the head. | Yes, for its whole life. | No, it feeds and leaves. | No, it hides near the bed. |
| Where do the eggs go. | Cemented onto the hair shaft. | They drop off the animal. | Into cracks and seams, never hair. |
| Where do the marks show up. | Nape, behind the ears, crown. | Ankles and lower legs. | Arms, shoulders, upper back. |
| Who clears it. | A lice clinic or a full comb-out. | Your vet, plus the house. | A licensed pest professional. |
Only One of These Three Lives on a Human Head
Head lice are specialists. They feed on scalp blood, they grip human hair with claws shaped for that exact strand width, and away from a head they fade fast. A louse found on a pillowcase is a louse already in trouble.
Fleas work the other way around. They’re built to jump onto something warm, feed, and go. Fleas in human hair do happen, usually in a home with an untreated pet, but it’s a visit rather than an address. Our hair is too sparse and too fine to hold them the way fur does.
Bed bugs barely belong in this comparison, except that worried parents keep asking. The EPA is clear about where they spend their time: When not feeding, bed bugs hide in a variety of places well away from the body. Mattress seams, headboards, the joints of furniture. They come out, they bite, they retreat. Hair is a terrible hiding place.
So don’t compare bodies. Compare addresses. If the thing you spotted was still there an hour later, on the head, under decent light, you’re looking at lice — and it helps to know what a live louse looks like against the scalp before you start second-guessing yourself.
The Eggs Answer It Faster Than the Bug Does
This test needs a thumbnail and nothing else. Try to slide the speck along the hair.
A nit won’t budge. The American Academy of Pediatrics puts the mechanism plainly: Nits attach to the hair with a sticky substance that holds them firmly in place. The female lays close to the scalp, where it’s warm. Dandruff flicks off. Product buildup slides. A nit resists, and you’ll feel it resist.
Flea eggs do the opposite, and it’s deliberate. Illinois public health guidance describes them this way: They are not sticky and fall down into the pet. They land in bedding and carpet, wherever the animal sleeps. Which means a flea that bit your child’s scalp left nothing behind to find. There’s no egg on the hair, because the egg was never meant to stay there.
Run the slide test on four or five specks near the nape and behind the ears. If every one of them moves, it isn’t lice. If two or three hold fast, you have your answer and you can stop wondering about the dog. Careful sectioning matters more than sharp eyesight here, which is the same reason how to check for lice on curly hair comes down to touch instead of sight.
Where the Marks Show Up Narrows It Further
Bites tell you less than eggs do. They’re still worth reading.
Lice irritation gathers where the scalp is warmest — the nape of the neck, behind the ears, along the crown. It’s a reaction to saliva, not a bite mark you can count, and that reaction can take weeks to switch on. It’s also why a first case often itches far less than a second one.
Flea bites land low. Ankles, shins, the backs of the knees. Fleas launch from carpet and pet bedding, so gravity does most of the sorting for you. A child with bites only below the knee, in a house with a scratching dog, has a flea problem in the carpet rather than a lice problem on the head.
Bed bug marks turn up on skin that was uncovered overnight, often in a rough line, and often on more than one person who slept in the same room on the same night.
None of this is a diagnosis. Skin is an unreliable witness. But when the bite pattern and the slide test point the same direction, you can move with some confidence.
What It Takes to Clear Each One
These three problems don’t share a solution. Treating the wrong one costs you a week.
Lice come off the head mechanically, and the eggs are the hard part. They’re glued on. A drugstore shampoo that kills crawling bugs can still leave viable nits behind, and that gap is why a case seems to clear and then returns. Reliable options here are professional Lice Lifters treatment and Lice Lifters products, worked through the hair section by section. If you’re weighing the home remedies that get tried first, most of them soften the problem without finishing it.
Fleas are a pet-and-house job. Treat the animal through your vet, wash the bedding hot, vacuum where the pet sleeps. Nothing you do to a child’s head touches a flea population living in the rug.
Bed bugs need a licensed pest professional. Store-bought foggers tend to scatter them deeper into walls and make the real treatment harder later.
If the slide test pointed at lice and you’d rather have it confirmed than spend a weekend guessing, you can book a head check at the Coral Springs clinic, which is open seven days a week from 9 AM to 8 PM with same-day appointments.
Which Situation Sounds Like Yours?
Match your household to one of three patterns. If the dog started scratching first, suspect fleas and call your vet. If a classmate went home early this week, suspect lice and get the head checked. If the bites are on arms and appeared overnight, call a pest professional. Two of those three point away from us.
The dog started scratching first. Fleas are the likely answer, and the fix lives at the vet and in the carpet. A head check still earns its place, because it takes the lice question off the table so you’re not chasing two problems at once.
A classmate went home early this week. That’s the lice pattern, and waiting is expensive because the eggs keep their own schedule. Screen the child, then anyone sharing a bed, a car seat headrest, or a pillow.
The marks showed up overnight on arms and shoulders. That one belongs to a pest professional, not to a scalp.
Two of those three send you somewhere other than a lice clinic. That’s the honest answer, not a hedge, and it saves you the week you’d lose treating the wrong thing.
A screening is short. Comes back clear, and you’ve ruled out the head and can turn on the house instead. Comes back positive, and a full comb-out appointment runs longer and works through the hair in sections.
Where a Head Check Won’t Help You
A screening answers one question well and several questions not at all.
Certified technicians work under bright light with a fine-tooth comb, section by section, and that method is dependable for finding live lice and cemented nits. It won’t confirm bed bugs. It won’t treat your pet. And it can’t tell you whether an itchy patch is eczema or dry scalp — that’s your pediatrician’s call, and saying so is better than guessing.
There’s also the parent who already reached for a pet flea product and used it on a child’s head. It happens more often than you’d expect, and it’s one reason the chemical-free approach matters here. A scalp that’s already irritated doesn’t need a second pesticide on top. When a case has been in the house a while, the steps to take after a known exposure apply to everyone under the roof, not just the child who scratched first.
Frequently Asked Questions
Can you get fleas in your hair?
Yes, but not for long. A flea can jump onto a head and bite, especially in a home with an untreated pet. Human hair doesn’t offer the cover or the feeding conditions that fur does, so the flea moves on. You won’t find flea eggs cemented to a strand.
Do fleas like human hair?
Not as a home. Fleas prefer a furry host and go back to the pet or its bedding. Bites on a person are usually opportunistic, and they tend to cluster low on the body rather than on the scalp.
Can bed bugs bite your scalp?
It’s possible, though uncommon. Bed bugs feed on exposed skin and retreat afterward into seams and cracks. A bite near the hairline can happen. Their eggs and hiding spots stay in the furniture, so hair is the wrong place to search.
Can Someone Just Look and Tell You Today?
Yes. A trained screening takes minutes and ends the guessing, and you don’t have to identify the bug yourself first. Bring the child in, get a clear answer on head lice, and leave knowing whether the problem sits on the scalp or somewhere else in the house entirely.
Lice Lifters of Broward County serves Coral Springs, Coconut Creek, Margate, Parkland, Deerfield Beach, Pompano Beach and the wider county. Call (954) 833-4301 or book a head check and get the answer the same day.