Muscle weakness, pain and spasms Schiff said muscle pain that feels similar to growing pains can be a sign of a vitamin D deficiency, as can something called hypocalcemic tetany, which is the ...

"If a child's been nicely growing on the 30th percentile and you see a sudden upsurge in weight, but the height is flattening out, those are red flags that should be checked out," explains Connie ...