The redness of the vulva of female infants may be related to diaper dermatitis, eczema or vulvovaginitis and other causes. 1. Diaper dermatitis: because the baby’s skin is more delicate, if the diaper is not often changed, the urine stimulation and hot and humid diaper can make the diaper wrapped area red, if there is secondary infection, easy to appear pimples or ulcers. 2. Eczema: infants have poor resistance, due to some internal and external factors, acute eczema, manifested in the vulva, anus, hands and feet and other parts of the erythema, pimples or blisters, oozing in severe cases, revealing a red moist vesicles. 3. Vulvovaginitis: after the vulva of infants and young children is contaminated by feces, urine and other contaminants, due to the imperfect development of the reproductive organs, it is easy to be infected by bacteria, which can cause vulvar itching, redness, swelling or burning pain, and the children are irritable. Infant vulva redness, need to go to the hospital specialist in time, follow the doctor’s instructions for treatment, it is recommended to change diapers in a timely manner, and to ensure that the baby’s body is dry and clean.