Calcium injections usually need to be given for 7-10 days, and vitamin D should be supplemented to promote the absorption of calcium ions. Calcium ions need to be replenished in a timely manner after deficiency, which can cause muscle problems and heart problems. Calcium ion deficiency can lead to the occurrence of limb cramps and spasms, and in severe cases, it can cause heart disease. Calcium deficiency in children can lead to the occurrence of rickets and pediatric convulsions, and in adults, it is mostly seen in limb cramps, which can be significantly relieved by active supplementation of calcium ions. Calcium ion absorption, with vitamin D in order to accelerate the absorption of calcium ions, calcium ions are very important ions for the human body, the human heart and bones have a very important role.