The best way to diagnose this infection is to do a tape test. The best time to do this is in the morning before bathing, because pinworms lay their eggs at night. Steps for the test are: Firmly press the sticky side of a 1-inch (2.5 centimeters) strip of cellophane tape over the anal area for a few seconds.
You may be able to see threadworm if you examine your child at night. Take a torch, separate your child's buttocks and look carefully around the anus (and the opening to the vagina in girls). You might see tiny white threads that may be moving.
The female adult worms leave the anus in the middle of the night while the person is sleeping to deposit her eggs around the skin of the perianal region. The eggs become infectious within a couple of hours after being deposited and can survive for about 2 weeks outside the host.
What are the symptoms of pinworm infections? Symptoms of a pinworm infection (enterobiasis) include: Anal itching, especially at night: Pinworms lay their eggs around the anus at night, causing itching and irritation. While symptoms are usually mild, anal itching can be severe.
An adult pinworm generally is 1/4 to 1/2 inch (about 6 to 13 millimeters) in length. The most common symptom of infection is anal itching, particularly at night, as worms migrate to the host's anal area to lay their eggs.
It is especially active at night or early morning. Rarely, the pinworm is seen on the surface of a stool. The pinworm's secretions are a strong skin irritant and cause the itching.
The eggs pass into the digestive system, where they hatch. About 1 to 2 months later, adult female pinworms lay eggs on the skin right around the anus, which makes the area itchy. Often, this happens at night.
Pinworm infections often produce no symptoms but, when they occur, symptoms can include: itchy bottom, especially at night.
The adult female worm crawls out of the infected person's anus at night and lays her eggs in the surrounding skin. This causes itching and scratching. The worms can also move to the vagina of a female child and cause itching. Eggs can live for 2 to 3 weeks outside the body.
Although not all infected people will have symptoms, many will experience itching around the rectum. Some females may also experience itching in the genital area. How soon do symptoms appear? Symptoms usually are noticed one to two months after infection.
Eggs may be inhaled from the air or deposited onto food and swallowed. Pinworms can survive up to two weeks on clothing, bedding or other objects, if kept at room temperature.
Chlorine dioxide gas inactivates pinworm eggs in a non-invasive and non-corrosive manner.
Red flags to look out for:
Loss of appetite. Weight loss. Bedwetting (consider other diagnoses e.g. Type 1 diabetes) Skin infections around anus caused by scratching.
They don't always cause symptoms, but people often experience itchiness around their bottom or vagina. It can be worse at night and disturb sleep. Read more about the symptoms of threadworms.
❖ Change and wash underwear, nightwear (and bed linen if possible) each day. Avoid shaking clothes and linen as any eggs on them may be wafted into the air and be swallowed.
In order to stop the spread of pinworm and possible re-infection, people who are infected should shower every morning to help remove a large amount of the eggs on the skin.
Your child may be fussy and wake often at night. If your child is infected, it may take 2 to 8 weeks for symptoms to start.
The itching from the pinworms might wake you up in the middle of the night and make you squirm a lot. So if you're itchy and sore on your bottom, tell your mom or dad. And if you see worms in your underwear or in the toilet, you should tell a parent right away.
Pinworm infection (called enterobiasis or oxyuriasis) causes itching around the anus which can lead to difficulty sleeping and restlessness.
Causes of an itchy bottom
a skin condition – such as atopic eczema or psoriasis. haemorrhoids (piles) – swellings that contain enlarged and swollen blood vessels in and around the anus. anal fissure - a tear or open sore (ulcer) that develops in the lining of the anal canal. a chronic condition - such as diabetes.
The key is to break the 6-week cycle of pinworm reinfection by killing any live pinworms and preventing the ingestion of eggs. A diagnosis should be confirmed before treating with medications. Medications kill only the adult worms and have no effect on developing eggs and larvae.
Many anti-worm preparations, for example pyrantel (e.g. brand names Anthel, Combantrin and Early Bird) and mebendazole (e.g. Combantrin-1 with Mebendazole, Vermox) can be bought over-the-counter at pharmacies. However, some are only available on prescription, such as albendazole (Zentel).
For the itching, wash the skin around the anus with warm water. For severe itch, use 1% hydrocortisone cream (such as Cortaid) 2 times per day. Use for 1 or 2 days. No prescription is needed.
If you are self-treating for pinworms, take the medication once only. Do not repeat the dose without talking with your doctor first. Depending on the type of worm infection you have, your doctor may direct you to take the medication only once or for several days.