The causes of vaginal odor in infants are as follows: 1, first of all, consider the problem of hygiene, such as poor hygiene, vulva unclean or anterior pubic area is often contaminated by stool, pay attention to pubic hygiene, wash the pubic area and buttocks more often, especially after each bowel movement must be washed, to maintain the dryness of the pubic area; 2, pubic hygiene is done very well, but there is also a bad smell, it is very likely to be the vulvar inflammation of the female infants, is generally the development of the vulva is imperfect in infancy and childhood, the low level of estrogen leads to infections, you can use dilute potassium permanganate sitz baths, if you find a foreign body of the vagina, it is necessary to remove it as soon as possible.