Yellow hair in children may be related to genetic factors, or it may be caused by malnutrition, iron deficiency anemia and other reasons. 1. Genetic factors: some children may have yellow hair on one or both parents, and under the influence of genetic factors, children may also have yellow hair, which is a normal physiological phenomenon, no need to worry too much, and no need for special intervention. 2. Malnutrition: Some children have insufficient intake of nutrients due to excessive partiality and picky eating, which can easily lead to the lack of trace elements, especially the lack of zinc, which can easily lead to yellow hair, and may also be accompanied by lack of luster of the hair, thinning, loss of appetite and other manifestations. 3. Iron deficiency anemia: some children due to iron deficiency anemia, resulting in a reduction in blood volume, the number of red blood cells decreased, may show yellow hair, may also be accompanied by weakness, pallor and other manifestations. Children with yellow hair, if accompanied by other obvious discomfort, it is recommended to seek medical attention as soon as possible, after clarifying the causes, to give targeted treatment and adjustment.