Adult pinworms are parasitic in the ileocecal region of the body, with the cecum, appendix, colon, rectum and lower ileum being the most common. Their nighttime emergence is not fixed and is generally possible from 11 p.m. to 4 a.m. Pinworms mainly crawl out of the anus after sleep when the anal sphincter is relaxed and lay eggs in the nearby skin. Most females die naturally after egg laying, but a few can return to the intestinal cavity and can also accidentally enter the vagina, uterus, urethra, and abdominal cavity, causing ectopic damage. The eggs that adhere to the skin around the anus and perineum develop quickly under conditions of 34°C-36°C, 90%-100% relative humidity, and sufficient oxygen, and after about 6 hours, the larvae within the eggs can develop into infective stage eggs. Pinworm disease is prone to widespread epidemics and has the characteristics of collective aggregation of children and family aggregation in distribution, so the treatment should be collective and simultaneous drug treatment to achieve the purpose of eradication.