Pinworms may run into the urinary system. Pinworms are intestinal parasites, the pathogenic microorganisms that cause the appearance of pinworm disease, causing the main symptoms of perianal and perineal itching. The urinary system is a system consisting of the bladder, urethra, ureters and kidneys. Pinworms are very likely to involve the urinary system during the development of pinworms, for example, pinworm invasion of the urethra will bring urinary symptoms such as painful urination, frequent urination, and urgent urination. In conclusion, pinworm invasion not only damages the tissues around the anus and the perineum, but also involves the damaged urethra, vagina, uterus and fallopian tubes, and is contagious. Individuals who are victimized by pinworms simply need to seek active medical treatment, as the disease itself can be effectively cured.