Bedwetting in children is generally not associated with zinc or calcium deficiency and there is no clear link.
In children with zinc deficiency, growth retardation, mental retardation, loss of appetite, poor resistance, slower reactions, difficulty concentrating and reduced vision can occur, while calcium deficiency can result in symptoms such as O-leggedness, X-leggedness and short stature. When a child wets the bed frequently, it is advisable to seek medical attention rather than taking zinc or calcium supplements on your own.