Hypocalcemia, Infant

Hypocalcemia means the calcium level in the blood is low. Calcium is a mineral in the body that is important for the function of:

  • Heart and muscle.

  • Cells.

  • Nerves.

  • Bone structure.

  • Blood clotting.

There are 2 kinds of hypocalcemia in infants:

  • Early hypocalcemia happens in the first few days of life. This early type is usually a temporary problem that is easily treated.

  • Late hypocalcemia shows up after the first few days of life.


Early hypocalcemia can be seen in:

  • Premature infants.

  • Babies born to mothers with diabetes.

  • Babies ill with infections or breathing problems.

  • Babies stressed at birth.

  • Babies born to mothers with hyperparathyroidism or other problems that can affect blood calcium levels.

There are several diseases that can cause late hypocalcemia. They are uncommon or rare. These diseases may not be temporary. Some of these rare problems include:

  • Hypoparathyroidism. The small parathyroid glands in the neck control vitamin D metabolism. If these glands do not work as they are supposed to, this can cause low calcium levels in a baby.

  • Problems in the liver. These problems can affect how vitamin D is used. If this happens, this can cause low calcium levels in a baby.

  • Intestinal problems. A few rare intestinal problems can make it hard for a baby to absorb vitamin D and calcium from the intestines. This can lead to low levels of calcium in the blood.


Babies with early hypocalcemia often show no signs. Others may show:

  • Shakiness or jerky movements.

  • Seizures.

  • Noisy or difficult breathing.

  • Vomiting.

  • Bloated or distended belly.


Low calcium is diagnosed with a blood test. If your caregiver is concerned about late hypocalcemia or another problem, other blood tests and urine tests may be needed.


The treatment will depend on what the cause of the low calcium is. Your caregiver will discuss these problems with you. Treatment of low calcium that is temporary may include:

  • Early feeding.

  • Supplemental calcium given through an intravenous (IV) access.

  • Oral calcium supplements.

For late hypocalcemia, treatment will vary depending upon the specific cause. Your caregiver will talk to you about the details of any problem found and what would be recommended for treatment.


  • Feed your baby as instructed by your caregiver.

  • Continue any prescribed medicine as directed.


  • Your baby has a poor appetite.

  • Your baby has jerkiness or shakes.

  • Your baby is unusually irritable.


  • Your baby has a convulsion.

  • You baby develops rapid breathing.

  • You notice sucking in of the spaces between or under the ribs.

  • Your baby makes a high-pitched noise when breathing in (stridor) or out (wheezing).

  • Your baby develops repeated vomiting.