Calcium deficiency in children may manifest as muscle weakness, easy fatigue, dry nails and skin, abnormal standing posture, and possible dental problems. Calcium deficiency can lead to numbness and tingling in the arms and hands, as well as increased nerve excitability. This is the earliest symptom of calcium deficiency, when children cry and fuss. Calcium deficiency may also cause children to be unrefreshed and always appear sleepy. If a child is found to be depressed, lethargic, or sluggish, this is the time to consider if the child is deficient in calcium. Calcium deficiency may cause dry and itchy skin, which may result in redness of the skin, and dry, broken and brittle nails, due to the lack of this trace element in the skin and nails, which may lead to dryness. Calcium deficiency may also lead to standing problems in children. Calcium deficiency can lead to bone problems, and children need calcium during the growth period in order to make their bones strong. Calcium deficiency can lead to deformities in the bones of the legs, which can affect the growth of the child and cause serious problems. Calcium deficiency can have a big impact on small children, and this is when parents need to supplement calcium to their children in a timely manner. Drink more milk in the diet to increase the amount of calcium your child takes in, and also seek professional medical help.