The mature worms then travel to the anus, where they deposit a new batch of eggs, usually at night. Contamination of the hands, clothing, and bedding can take place at this time. Infection with pinworms usually causes itching around the anus, and irritability, often because of disrupted sleep. Some individuals with pinworm infection may not have any symptoms. The symptoms may start 2 weeks after ingesting infective pinworm eggs.
Antiparasitic medications prescribed by a doctor are effective in pinworm infections.
Household and intimate contacts may also require treatment. Reinfection is common and several treatments may be necessary if exposure to the parasite continues. Infected children may return to school after appropriate treatment. Pinworm eggs can remain alive in an indoor environment for up to 2 weeks. Thus, it may help to vacuum or clean the classroom or workplace daily for several days after starting treatment of cases.