What is a pinworm infection?
Pinworms are an intestinal infection caused by tiny parasitic worms. It is a common infection that affects millions of people per year, especially school-age children.
If your child has a pinworm infection, try not to worry. Pinworms are harmless - they just itch and disrupt sleep - and getting rid of them will not take long.
How are pinworm infections spread?
Pinworm infections are contagious.
Pinworms enter the body when a person ingests or breathes their microscopic eggs. These eggs can be present on contaminated hands or surfaces, such as the following:
- bed sheets
- towels
- clothing (especially underwear and pajamas)
- toilets
- bathroom elements
- foods
- glasses
- cutlery
- toys
- kitchen countertops
- desks or dining tables in a school
- sandboxes
The eggs pass into the digestive system and hatch in the small intestine. From the small intestine, pinworm larvae pass into the large intestine, where they live as parasites (with their heads attached to the inner wall of the intestine).
About 1 to 2 months later, adult female pinworms travel through the large intestine to the area around the rectum. There, they lay eggs and this can cause itching around the anus.
When a person scratches that itchy area, microscopic eggs pass onto the fingers. Contaminated fingers can carry pinworm eggs to the mouth, where they re-enter the body, or they can remain on various surfaces, where they can live for 2 to 3 weeks.
If you are thinking that your pet could infect your child with pinworms, forget it. Pinworms do not come from animals.
What are the signs and symptoms of pinworm infection?
The most common signs of a pinworm infection are itching around the rectum and interrupted sleep. The itching is usually worse at night because the worms go to the area around the rectum to lay their eggs. In girls, pinworm infection can affect the vagina and cause vaginal discharge. If the skin is injured due to itching, a bacterial infection may also appear.
If your child has a pinworm infection, you can see the worms in the anal region, especially if you look within 2 to 3 hours after the child has fallen asleep. You may also see the worms in the toilet after your child goes to the bathroom. They look like little pieces of white thread and they are actually very small (they are about the length of a paper staple). You may also see them in your child's underwear in the morning.
Abdominal pain and nausea are less common symptoms, but they can appear if there are many pinworms in the intestines.
How are pinworm infections diagnosed?
Your doctor may ask you to help diagnose pinworms by placing a piece of tape against your child's rectum. The pinworm eggs will stick to the tape and can be viewed under a microscope in a laboratory.
The best time to collect an egg sample with a tape is at night or in the morning before taking a bath, because this is the time when pinworms are most active around the rectum. The doctor may also take samples from under your child's nails to check for eggs.
How are pinworm infections treated?
If your child has a pinworm infection, the doctor will recommend a prescription or over-the-counter medicine for the worms. This medicine is given in one dose and is repeated after two weeks. The doctor may decide to treat the whole family, especially if your child has already had a pinworm infection.
While the medications solve the problem of pinworm infection, the itching can continue for about a week. For this reason, the doctor may give your child a cream or other medicine to stop the itching.
The Handwashing frequent and routine cleaning of the house (including the frequent change of underwear and washing pajamas, towels and sheets for the whole family) will also help prevent the spread of infection pinworms in the family.
Can pinworm infections be prevented?
Here are some ways to prevent pinworm infections in your family:
- Remind your children to wash their hands often, especially after using the bathroom, after playing outside, and before eating.
- Make sure your children bathe every day and change their underwear and bathing suits every day.
- Keep your children's nails short and clean.
- Tell children not to scratch near the rectum and not to bite their nails.
- Wash your children's pajamas every few days.
When should I call the doctor?
Call the doctor if your child complains of itchy skin or always seems to be scratching in the anal or vaginal area.
If your child is having trouble sleeping or has started to wet the bed , ask the doctor if it could be due to pinworms. (Pinworms can irritate the urethra, which is the channel through which urine leaves the bladder and out of the body. This could cause your child to wet the bed.)
Remember that pinworms are quite common in children and are not harmful. If you take the medications and follow some preventive tips, you will get rid of them quickly.