Video describing the symptoms and treatment of threadworm, including the importance of treating all household members.
Threadworms are common in children but anyone of any age can be affected. The most common sign of threadworm is itching around the anus (itchy bottom), which is worse at night. Medication together with strict hygiene measures can help clear up a threadworm infection and reduce the likelihood of reinfection.
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(NHS Choices, UK, 2015)