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Diseases & Conditions
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Hyperparathyroidism is excessive production of parathyroid hormone by the parathyroid glands.
The parathyroid glands are located in the neck, near or attached to the back side of the thyroid gland. They produce parathyroid hormone, which controls calcium, phosphorus, and vitamin D levels within the blood and bone. When calcium levels are too low, the body responds by increasing production of parathyroid hormone. This increase in parathyroid hormone causes calcium to be taken from the bone and more calcium to be reabsorbed by the intestines and kidney. When the calcium level returns to normal, parathyroid hormone production slows down.
Symptoms may include:
- Fatigue
- back and joint pain
- decreased height
- increased urine output
- increased thirst
- upper abdominal pain
- nausea
- muscular weakness or pain
- depression\
- coma
- itching
- blurred vision
Types inlcude:
- Primary hyperparathyroidism - caused by enlargement of one or more of the parathyroid glands
- Secondary hyperparathyroidism - the body produces extra parathyroid hormone because the calcium levels are too low
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