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A. Pinworms do not usually cause any symptoms beyond minor itching around the anus. Many people with pinworm infections have no symptoms and may never be aware of the infection. The infection can go away without treatment. The most common symptoms of pinworm infection in children include: 1  Itching around the anus.2  For most children this symptom is mild. 3  Only in rare cases do children have very severe itching. 4  Restless sleep (itching is often worse at night).he infection can go away without treatment. The most common symptoms of pinworm infection in children include: 1  Itching around the anus. 2  For most children this symptom is mild. 3  Only in rare cases do children have very severe itching.
Pinworm inhabits the colon and rectum, feeding on Escherichia coli (E. coli) bacteria in the stool. Late at night when children are asleep, the female pinworm, which measures about the length of a staple (0.5 inch or 13 millimeters), emerges from the anus and lays her eggs on the surrounding skin.