The causes of zinc deficiency in children include the following: First, it is caused by congenital deficiency. If the mother consumes less zinc during the fetal period, after the child is born. The amount of zinc in the body is significantly low. Secondly, it is caused by insufficient intake after birth. If a child has a low intake of food containing zinc after birth, this can also cause zinc deficiency. Once again, excessive consumption. If the child has a fever or a chronic neoplastic disease, this condition can cause excessive consumption. Finally, children with chronic diarrhea, chronic fever, and chronic liver and gallbladder diseases can also cause zinc deficiency. Zinc deficiency in children should be treated with zinc supplements, such as zinc licorice granules.