Infant girls have poorly developed vulva, thin vaginal epithelium, low resistance, and poor ability to resist infection, so they are susceptible to bacterial infection and inflammation, which manifests as redness, swelling, pain, itching and crying in the vulva, some of which may be accompanied by frequent, urgent and painful urination. The vulva and clitoris may be red and swollen, and the urethral opening and vaginal entrance may be congested, edematous or broken. To prevent redness and infection in the vulva of baby girls, pay attention to hygiene, keep the vulva clean, reduce friction, keep it dry, choose diapers that are breathable and absorbent, and wash after stools to prevent fecal infection of the vulva. Reduce the use of diapers, also pay attention to the baby’s clothing and adult clothing to be washed separately, especially underwear, underwear, choose special laundry detergent for babies, female babies appearing vulvar redness, can not be handled privately, not to mention the use of adult care solution, if necessary, go to the hospital for medical consultation.