What causes small worms to come out of a child's anus?

Causes of small worms appearing around a child's anus: 1. **Pinworm infection**: The small worms commonly seen near a child's anus are pinworms, a type of common intestinal parasite. Pinworm infections frequently occur in school-age children and are primarily transmitted through oral ingestion of the eggs. After the eggs hatch, the worms reside in the intestines, causing itching and discomfort. 2. **Poor hygiene habits**: Poor hygiene practices in children, such as infrequent handwashing, failure to wash hands after scratching the anal area, or wearing unclean underwear, can easily lead to pinworm infection. Pinworm eggs can survive in the environment, increasing the risk of transmission. 3. **Transmission within families**: Pinworm infections can spread among family members. Worm eggs may be transmitted through sharing bedding, towels, and other personal items. Therefore, parents should pay attention to the health status of all family members and take necessary preventive measures. If small worms are found around a child's anus, it is recommended to seek medical attention as early as possible.