Three-year-old children's hemoglobin value should be above 1 10g, and below 10g belongs to anemia. Hemoglobin 90g belongs to mild anemia, which is generally caused by malnutrition, iron deficiency or vitamins.

Guiding opinions:

It is suggested to check iron parameters, vitamin B 12, folic acid and other substances to determine the cause of anemia. If it is caused by iron deficiency, this can be treated with iron. Usually eat more foods with high iron content, such as animal liver, egg yolk and meat products.