The causes of vaginal odour in infants are as follows: 1, first of all, consider the problem of hygiene, such as poor hygiene, vulva unclean or the anterior pubic area is often contaminated by stool, pay attention to the 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 also the emergence of the odour, is very likely to be the vulvar inflammation of the female infants, is generally the infantile period of vulvar development is imperfect, the low level of oestrogen leads to infections, you can use the dilution of potassium permanganate sitz baths, if you find a foreign body of the vagina, it is necessary to remove it as soon as possible.