Threadworms and head lice

Also called Pinworms, Nits

Extremely common, harmless, and nothing to do with cleanliness. The shame is the part that does the damage.

What it is

Two unrelated but similarly misunderstood infestations, put together because the advice and the stigma are the same.

**Threadworms** are small white worms in the bowel, and they are very common in children: a large proportion of primary-age children have them at some point. Eggs are swallowed, usually from hands, and the female worm lays eggs around the anus at night, which is why the itch is worse then.

**Head lice** are insects living on the scalp, spread by head-to-head contact. They cannot jump or fly, they do not live on furniture or pets, and they show no preference for clean or dirty hair.

Neither is a sign of a dirty home, poor parenting or neglect, and both are repeatedly treated as though they were. That belief causes real harm: families hide it, do not treat it, and children are left itching, sleepless and blamed.

For head lice, the diagnosis requires finding a living, moving louse. Eggs and empty shells alone do not mean an active infestation, and treating on the basis of nits is how families end up applying treatment repeatedly for nothing.

Signs you might notice

Threadworms: itching around the anus, worse at night; disturbed sleep and irritability; sometimes tiny white thread-like worms visible in the stool or around the anus, best seen with a torch a few hours after the child falls asleep. Girls may have soreness around the vulva or a urinary infection picture.

Head lice: itching of the scalp, particularly behind the ears and at the nape; a feeling of movement in the hair; visible lice found by combing wet, conditioned hair with a fine-toothed detection comb.

See a GP rather than treating at home if: the child is under two; the person is pregnant or breastfeeding; there is a rash, weeping or crusting of the scalp, which can mean impetigo; the threadworm treatment has failed twice; or there is any weight loss or blood in the stool, which is not threadworms.

How it can affect day-to-day life

Reinfection is the norm rather than a failure. Threadworm eggs survive on bedding, towels, toys and under fingernails for around two weeks, which is why treating one person and nothing else does not work.

Everybody in the household needs treating on the same day for threadworms, whether or not they have symptoms.

For head lice, the wet combing method works without any chemical and is the recommended approach for young children and in pregnancy. It takes 15 to 30 minutes, repeated on days 1, 5, 9, 13 and 17, and it fails mostly because people stop after the first go.

Children should not be kept off school for either. Exclusion causes far more harm than the infestation.

In residential settings and large families, a coordinated same-day treatment is the only version that works. Treating one child a week is a permanent cycle.

Supporting someone well

Threadworms: treat everyone in the household on the same day, then again after two weeks. Wash bedding, towels and nightwear hot on day one. Keep nails short, wash hands and scrub under nails after the toilet and before eating, shower or bathe first thing in the morning to remove overnight eggs, and avoid shaking bedding.

Head lice: find a live louse before treating. Wet comb with plenty of conditioner and a detection comb, or use a physical treatment such as dimeticone, applied twice, a week apart. Check the whole household on the same day and treat only those with live lice.

Do not use household insecticides, do not treat the furniture, and do not treat pets. Neither infestation lives there.

Tell the school so other families can check, and say plainly that it is not about cleanliness.

Do not blame the child, and do not let anybody else. Shame is what stops treatment happening.

A pharmacist can supply and advise on both, and is the right first stop.

Where to get help

A pharmacist for treatment and advice on both, including through Pharmacy First.

A GP practice for children under two, in pregnancy, for a scalp that is weeping or crusted, or when treatment has failed repeatedly.

The school nurse or health visitor for outbreak advice in a setting.