If the color, amount and nature of the leukorrhea are normal and there is no peculiar smell, but the vulva itches, the most common reasons are as follows: First, caused by pubic lice, pubic lice is a kind of sexually transmitted disease, mainly in the pubic hair will grow parasites, the parasites will lay eggs and reproduce, and the parasites will crawl on the pubic hair and cause severe itching. Second, because of the vulvar dermatitis caused by, such as vulvar eczema, vulvar seborrheic dermatitis, allergic dermatitis may lead to local itching symptoms. Third, because of vulvar malnutrition caused by itching, vulvar skin color will become white and there will be more serious itching, only to go to the hospital to do the appropriate examination to make a diagnosis, and then give treatment.