#asktheexperts my son is 4 yrs old. his weight is 12 yrs. he is fussy eater. I don't know how to gain his weight. he is active baby . not at all lazy but do not eat properly.

A. Could be associated with deficiency of iron in the body sometimes when it is low affect the growth also of the child and the appetite as well and just keep the child physically more active so that the appetite increases naturally and try to give different options and varieties to develop an interest in the child to eat better