These are likely pinworms, a very common and highly contagious but harmless parasitic infection. They are not dangerous and do not cause serious harm, though they can cause itching, especially at night. Pinworms are easily treated with over-the-counter or prescription generic medications such as mebendazole or pyrantel pamoate. Since they spread easily, it is important that everyone in your household is treated at the same time, even if they do not show symptoms. Additionally, washing all bed sheets, underwear, and pajamas in hot water will help prevent reinfection. Please consult a healthcare professional to confirm and get the correct dosage.