If a one-year-old baby’s face turns yellow, it is usually considered related to malnutrition, anemia, deficiencies in vitamins and trace elements, indigestion, and weak spleen and stomach. These are all directly related. You can take the baby to the hospital for routine blood tests, trace element tests, and other relevant checks based on other normal conditions. You need to supplement food in a timely manner, eat more vegetables and juices, consume more high-protein foods, and adjust according to different test results.