If your baby is three months old and has lanugo on his head, you can use water to wash his hair and use sterilized vegetable oil or paraffin oil to soften the lanugo and remove it. 1. Wash hair with water: if the fetal fat is not particularly much, you can use water to wash the baby’s hair, you can use your fingers to massage the baby’s head when washing the hair, to promote the shedding of fetal fat, you should pay attention to avoid forceful picking, to avoid damage to the baby’s skin. 2. Vegetable oil or paraffin oil: if the baby three months, the head of the fetal fat is more, with water can not be cleaned down, you can use sterilized vegetable oil or paraffin oil, will be vegetable oil or paraffin oil coated to the place of the fetal fat, can soften the fetal fat, is conducive to the removal of fetal fat. The baby’s three-month head with birthmarks, according to the specific situation to choose the appropriate method of removal, if the removal process appears abnormal phenomenon, should be timely consultation.