It can be caused by PTH disorders or by problems with vitamin D.
Hypocalcemia can be a medical emergency. Pay attention to the airway and the ECG.
It can lead to paresthesias, neuromuscular irritability (cramps), tetany, laryngeospasm/broncheospasm, seizures, arrhythmias, prolonged Q-T interval, and congestive heart failure.
cararacts, and soft tissue calcification.
Calcium deficiency can lead to osteomalacia and osteoporosis.
100-300 mg IV