There are two reasons for children to eat nails: First, the lack of trace elements, especially iron deficiency when the child will have xenophagia, some children will show like chewing nails, you need to take the child to the hospital for trace element testing, according to the results of the actual trace element test to give supplementation, if there is indeed a lack of the phenomenon can be given ferrous sulfate oral solution plus vitamin C oral treatment together can be. Second, psychological factors, children in the process of growing up due to lack of security or in a nervous, emotional situation often eat nails, or children in the life of the behavioral problems caused by the child, you need to take the child to the hospital child psychological counseling clinic for psychological intervention treatment, the more parents forced, the more the child said the more likely to cause the child’s symptoms aggravated, so it is necessary to go to the hospital under the guidance of doctors The more parents force and talk the child, the more likely the child’s symptoms will worsen.