The pubic lice symptoms you notice first are itching in the pubic hair, yellowish-white dots glued to the hairs, and sometimes reddish-brown specks in your underwear. The itch usually appears only two to four weeks after transmission and is worst at night.
That delay surprises many people. You have the lice for weeks before you notice anything.
The reason is that the itch does not come from the bite itself but from an allergic reaction to the louse's saliva. Your immune system has to learn to recognise it first.
What is the first symptom of pubic lice?
The first symptom is almost always itching in the pubic area that does not settle. Unlike irritation after shaving, this itch gets worse over days to weeks rather than better. It sits in the hair-bearing part, not on the smooth skin of the glans or the labia.
Waking up scratching? That is typical.
Lice are more active in the dark and skin is warmer under a duvet, so the itch peaks between midnight and morning. With a second infestation it can start much faster, because your immune system already knows the saliva.
What do pubic lice and nits look like?
An adult pubic louse is about 3 millimetres, greyish-brown to skin-coloured, and wider than it is long. The nits are oval yellowish-white dots under a millimetre, cemented firmly to the hair shaft. You cannot wipe them off, which is the best way to tell them from dandruff or leftover shaving foam.
The louse itself moves slowly and grips two hairs at once with six legs.
| What you see | Pubic lice | Dandruff or skin flakes | Soap or cream residue |
|---|---|---|---|
| Size | Nit under 1 mm, louse around 3 mm | Variable, often larger and irregular | Variable |
| Colour | Yellowish-white to greyish-brown | White to grey | White |
| Does it wipe off? | No, it is cemented on | Yes | Yes |
| Exact position | On the hair shaft, often close to the skin | Loose between the hairs | On the skin |
| Does it move? | The louse does, slowly | No | No |
A magnifier or your phone's zoom helps enormously. Daylight shows more than bathroom lighting.
Where on the body do pubic lice sit?
Pubic lice mainly sit in pubic hair, but they like any coarse hair. That means armpit hair, chest hair, leg hair, beards, moustaches, eyebrows and sometimes eyelashes. They cannot survive on scalp hair, which is too fine to grip.
In people with a lot of body hair the infestation can spread further than expected.
Lice in the eyelashes are rare and call for a different approach, because the usual cream does not belong close to the eyes. According to Thuisarts.nl, that is one to discuss with your GP.
What are maculae ceruleae?
Maculae ceruleae are bluish-grey marks of half to one centimetre on the skin of the lower abdomen, the groin or the inner thighs. They come from tiny bleeds where lice have fed. They are painless and fade on their own after treatment.
Many people mistake them for bruises.
They are not always present, but seeing them alongside itching points strongly towards pubic lice. For the full picture, symptoms, treatment and testing sit together in our main article on pubic lice.
Can pubic lice cause no itching at all?
Yes. Some people with pubic lice notice little or nothing, certainly in the first weeks and certainly with a first infestation. The itch is a reaction from your own immune system, and that reaction varies a great deal between people.
Which is why some people find the lice by chance.
No itching does not mean you are not contagious. As long as live lice and nits are present, they can walk across to a partner.
When is it probably something else?
If the itch started within a few days of shaving and you see small pimples around the hairs, folliculitis fits better. If the itch sits mainly between your fingers and on your wrists and rages at night across your whole body, think scabies. Red, moist patches in the groin folds point more towards a yeast infection.
None of these three can be shown by a laboratory test.
If you cannot tell crabs from scabies, is scabies an STI explains the difference. If your complaint fits none of the boxes, see genital itching causes.
What if the itch persists after treatment?
Itching can continue for one to two weeks after all lice are dead, because the allergic reaction needs time to settle. Persistent itching is therefore not automatically a sign that treatment failed. Seeing live lice after a week is a reason to look further.
The difference lies in what you see, not in what you feel.
How to handle that second round is covered in pubic lice treatment. And because pubic lice often travel with a second, symptom-free infection (31.4 percent in the Chapel et al. series, 1979), some people choose to also get checked for chlamydia, gonorrhoea and trichomonas. Always discuss a result with your GP.
References
- Patel PU, Tan A, Levell NJ. A clinical review and history of pubic lice. Clinical and Experimental Dermatology, 2021. PMID 33811771
- Chapel TA, Katta T, Kuszmar T, DeGiusti D. Pediculosis pubis in a clinic for treatment of sexually transmitted diseases. Sexually Transmitted Diseases, 1979. PMID 531724
- Thuisarts.nl, Ik heb schaamluis. thuisarts.nl
- RIVM, LCI guideline scabies. lci.rivm.nl
Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
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