The average weight for a boy of 7 years is 24kg. So your son is underweight. You have not given me his height as he may be one of those tall but rather thin boys.Do not force him to eat. The family must eat together. Put his food in front of him and let him eat what he wants to eat. Don't make any remarks about him not eating. Simply clear his plate off the table when he seems to have finished eating. Try and give him foods that he seems to like.He will gradually start eating better and better.
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