The key moment of this infection happens at night. While the child sleeps, the adult female—already filled with eggs—migrates to the perianal area to deposit them. This movement, along with the adhesive substance used to attach the eggs, causes the intense itching that typically worsens when the child lies down.
This discomfort often wakes the child or makes them restless, and repeated night after night, it disrupts sleep and causes skin irritation.
How Reinfection Happens
This itching triggers a cycle of reinfection that’s difficult to stop without proper measures. When the child scratches, eggs stick to their fingers and get trapped under the nails. From there, any contact with the mouth or objects increases the chance of reinfection or spreading the eggs into the environment.
This explains why pinworms can spread so quickly at home: a single untreated case can easily lead to multiple infections within the family.
How Pinworms Are Diagnosed
Diagnosis is usually made using a simple method known as the “tape test” or Graham Test. This involves placing a piece of adhesive tape against the anal area first thing in the morning, before the child bathes or uses the bathroom.