The root causes that cause infection are:
- Ingestion of contaminated water or food: The larvae or eggs of pinworms are found in contaminated food, especially through vegetables or vegetables irrigated with sewage infected by these worms. When these foods are not thoroughly washed and eaten raw, pinworm can penetrate inside the body.
- Contact with the larvae that can penetrate through the skin: This type of infection is very common in young children. These may have infected hands because of scratching their anal area and leave the eggs or larvae on clothes, hands or objects. Ingestion of these eggs or larvae can infect others or reinfect those affected. Sometimes children can enter the infected finger in his mouth or in the mouths of other children. This type of infection can also occur in older people.