is the commonest cause.
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Elevated calcium level is called as hypercalcemia
.The normal level of calcium is 9-10.5 mg/dl.
The commonest cause for hypercalcemia is hyperparathyroidism.
Hyperparathyroidism is because of enlargement of the parathyroid glands which surround the thyroid glands and are present in the neck. About 80% to 90% of cases of hypercalcemia are because of hyperparathyroidism.
The other less common causes for hypercalcemia are use of drugs like thiazide diuretics, renal failure
Once you are diagnosed with hypercalcemia you need further investigations like estimation of parathyroid hormone
level for diagnosis of underlying cause for elevated calcium level.
Hence I advice you to consult Physician or Endocrinologist
for further evaluation and treatment accordingly.
Hope I have answered your query.