The main reasons for babies to be born with excess sebum usually include adequate nutritional intake by the mother, and higher secretion of sebaceous glands by the fetus. Newborn sebum is the milky white skin flakes attached to the surface of the newborn’s body after birth. Some babies have more sebum covering the whole body, which is mainly caused by the sufficient nutrition intake of the pregnant mother, which will be absorbed into the fetus through the umbilical cord, promoting the metabolism of the fetus, which secretes more sebaceous glands and combines with the epidermis shedding to form sebum. In terms of appearance, sebum is usually a layer of milky-white oily substance adhering to the surface of the baby’s skin, which can protect the baby’s skin, and sebum has no obvious effect on the fetus.