Hypercalcemia means you have too much calcium in your blood.
Calcium - elevated; High calcium level; Hyperparathyroidism - hypercalcemia
Parathyroid hormone (PTH) and Vitamin D help manage calcium balance in the body.
The most common cause of high calcium blood level is excess PTH released by the parathyroid glands. This excess occurs due to:
Calcium blood level may also be high if your body is low on fluids or water.
Other conditions can also cause hypercalcemia:
Men and women of all ages can have a high blood calcium level. However, it is most common in women over age 50 (after menopause). In most cases, this is due to an overactive parathyroid gland.
The condition is most often diagnosed at an early stage using routine blood tests. Most people have no symptoms.
Symptoms due to high calcium level may vary, depending on the cause and how long the problem has been present. They may include:
An accurate diagnosis is needed in hypercalcemia. People with kidney stones should have tests to evaluate for hypercalcemia.
Treatment is aimed at the cause of hypercalcemia whenever possible. People with primary hyperparathyroidism (PHPT) may need surgery to remove the abnormal parathyroid gland. This will cure the hypercalcemia.
Severe hypercalcemia that causes symptoms and requires a hospital stay may be treated with the following:
How well you do depends on the cause of your high calcium level. The outlook is good for people with mild hyperparathyroidism or hypercalcemia that have a treatable cause. Most of the time, there are no complications.
People with hypercalcemia due to conditions such as cancer or sarcoidosis may not do well. This is most often due to the disease itself, rather than the high calcium level.
These complications of long-term hypercalcemia are uncommon today in many countries.
Contact your health care provider if you have:
Most causes of hypercalcemia cannot be prevented. Women over age 50 should see their provider regularly and have their blood calcium level checked if they have symptoms of hypercalcemia.
Talk to your provider about the correct dose if you are taking calcium and vitamin D supplements.
Aronson JK. Vitamin D analogues. In: Aronson JK, ed. Meyler's Side Effects of Drugs. 16th ed. Waltham, MA: Elsevier B.V.; 2016:487-487.
Coleman RE, Brown J, Holen I. Bone metastases. In: Niederhuber JE, Armitage JO, Kastan MB, Doroshow JH, Tepper JE, eds. Abeloff's Clinical Oncology. 6th ed. Philadelphia, PA: Elsevier; 2020:chap 56.
Reid LM, Kamani D, Randolf GW. Management of parathyroid disorders. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 123.
Thakker RV. The parathyroid glands, hypercalcemia, and hypocalcemia. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 232.
Reviewed By: Sandeep K. Dhaliwal, MD, board-certified in Diabetes, Endocrinology, and Metabolism, Springfield, VA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.