The type of worm can be easily identified by symptoms and whether the worms are visible in children's stools.

Threadworms are the most common worm infestation in the UK and are typically identified by itchiness of the bottom, and can sometimes be seen in stools or when your child is sleeping.

Roundworms can be seen in stools and are much longer than threadworms. Hookworms, whipworms and tapeworms attach themselves to the intestines and are, therefore, not seen in stools.

For more information on the different types of worms, what they look like and symptoms, click here.

Threadworms are tiny, white worms, about half an inch (1cm) long, which look like "threads" of white cotton - hence the name "threadworms".

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The most common sign that someone has threadworms is itchiness and scratching around the bottom, which is usually worse at night. This symptom is specific to threadworm infestations.

Other signs to look for are;

Disturbed sleep

Irritability

Loss or increase of appetite

In some cases worms can enter the vagina or urinary passage, causing:

Bedwetting

Vaginal irritation

Cystitis

However, around 30% of affected people do not show any signs of infestation, in which case it is a question of spotting the tiny white "thread-like" worms in the stools.

Yes. Around 30% of people can show no symptoms at all. In this case it is a question of spotting the tiny white “thread-like” worms in the stools.

Threadworm infestations are simple to manage, but it is best to treat the whole family as they are easily spread.

The leading threadworm treatment available from pharmacies is Ovex, a single dose treatment for all the family. This should be combined with basic hygiene measures. Click here to find out more.

Ovex is a simple, one dose treatment for threadworm, suitable for the whole family. It is available in both a tablet and suspension (liquid) format for adults and children over two years.

Ovex should not be taken by women who are pregnant or are breast-feeding.

Yes. Once you have seen threadworms in one member of the family, the chances are the other members have them too as they are so easily spread. School friends can also have them, so it is advisable to inform the school.

Up to six weeks, but they cannot live outside the body for long. However, their eggs can last outside the body for up to three weeks.

Yes. It is possible to pick up worm eggs from clothing, bedding or towels. They can be transferred onto hands and then swallowed. Eggs remain viable for up to 3 weeks and can be easily spread.

As long as the child is treated and basic hygiene tips are followed, there is no reason to keep your child off school.

It is advised that you inform the school that your child has threadworms. Click here to download a letter to the school.

Yes. The eggs of the worm will lodge underneath fingernails and are particularly difficult to remove. Cutting nails short reduces the risk of re-infestation, as well as using a nailbrush when cleaning hands.