What causes pinworm vaginitis?

Patient's question:

Last week, I started feeling itchy inside the vagina. I thought it was a common vaginal inflammation and bought medication to treat it myself. After taking it a few times, it didn't work, and it got worse. Out of desperation, I went to the hospital for a thorough examination, and it turned out to be oxyuriasis (threadworm vaginal inflammation). What causes oxyuriasis vaginal inflammation?

Doctor's answer:

Nematodes feed on blood in the large intestine. Female nematodes crawl out from the anus within 2 hours after the host falls asleep at night. Due to favorable temperature and sufficient oxygen, they lay a large number of offspring around the anus, in the perineum, and in the folds of the vulva. Female nematodes can enter various parts of the reproductive tract through the vaginal opening, such as the vagina, cervix, uterus, and fallopian tubes. Mechanical and chemical stimuli, as well as the intestinal bacteria they carry, can cause local allergic reactions and inflammatory infections.
Mechanical irritation: Female nematodes crawl out of the anus at night to lay eggs, and their heads and tails cross-attach to the skin, causing pain around the anal area.
The daily treatment for vaginitis primarily focuses on symptomatic relief. Patients can take oral medications, supplement with vitamins, and maintain a regular sleep schedule while avoiding alcohol.

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