White gums in three-month-old babies are most often caused by milk stains remaining on the gums due to lack of cleaning while breastfeeding, hence the phenomenon of white gums. Parents can keep their baby’s mouth clean by rinsing it. In addition, the baby gums white may also be caused by teething, anemia, etc. 1, teething: If the gums of a three-month-old baby are white, parents touch the inside with their hands and there are hard objects, the baby will also have drooling, irritability, refusal to eat and other symptoms, it may be that the dental embryo is developing, that is, ready to grow teeth. Although baby teething is usually around 6-8 months, but because of individual differences, each baby teething time will be different, three months of baby teeth may also begin to erupt, parents can prepare some teething sticks for the baby, to help relieve the discomfort of the baby’s gums; 2, anemia: if the baby is anemic will also lead to white gums, but also accompanied by mental inactivity, inattention, loss of appetite, and If your baby is anemic, he or she will also have white gums, along with a lack of concentration, loss of appetite, and white nails or eyelids, you need to seek medical attention to identify the cause. The most common type of anemia in babies is iron deficiency anemia, which can be treated with medication under the guidance of a doctor, such as oral iron supplements.