Pinworms are intestinal parasites that, when infected, can cause physical, mental and health damage of varying degrees, such as nocturnal anal itching, gastrointestinal dysfunction and digestive symptoms, abnormal neurological and psychological behavior, and even xenophagia in children, and long-term severe infection can cause stunted growth. Pinworms can also be ectopic parasites causing pinworm appendicitis, urethritis, inflammation of the genital tract and damage to internal organs. If you find out that your baby has pinworms, you need to treat them in a timely manner. Pinworms are widely transmitted mainly among young children and children. After the pinworm lays its eggs, the skin around the anus feels itchy due to the stimulation of the pinworm’s crawl, and the child often scratches it with his or her hands, and the eggs are stuck on the fingers, so if you take something to eat or bite your nails without washing your hands, the eggs will be re-swallowed. After the eggs enter the digestive tract, the larvae in the eggs come out of their shells and develop into adult worms in the intestine due to the action of digestive juices, thus causing repeated self-infection. The eggs on underwear, blankets, toys, household items, and other miscellaneous items contaminated with eggs can also infect other children. If one child in the nursery has pinworms, it is easy to infect other children. Effective prevention and control measures are to strictly prohibit children from wearing open pants in kindergartens or children’s playgrounds, to wash hands before and after meals, to cut nails regularly, and to iron bedding and wash toys regularly. Parents should not panic if they have pinworms, they can take deworming medication.