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Primary hyperparathyroidism: high calcium, the parathyroid glands, the tests, and surgery or watching
For anyone told their blood calcium is high, anyone told they have primary hyperparathyroidism or a parathyroid adenoma, anyone deciding between surgery and watching, and the people who love them. It passes on, by name, what the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK, part of the NIH) says: what the parathyroid glands do and who gets it, what it can lead to and the signs, the causes, the tests, and surgery, watching, medicines and food. It builds the words to say, and prints a card for your notes. Nothing is saved.
A word with a dotted line under it, like this, opens its official definition, quoted from a U.S. government glossary.
Right now
- Sudden confusion, someone hard to wake, or vomiting so you cannot keep fluids down? Go to the emergency room now, or call 911 if you cannot get there safely (ours: NIDDK lists confusion, nausea and vomiting among the signs of more severe disease, but its page names no 911).
- Very bad pain in your back, side or belly? Our kidney stones guide says when that is an emergency (ours).
- Thoughts of suicide? Call or text 988, any hour, free (ours).
More help
- On this site: Kidney stones · Osteoporosis · When it’s your kidneys · Heart, blood and hormones: find the right page.
- Alongside it: Underactive thyroid (a different gland) · When the heaviness won’t lift · My medicines.
- When it is hard to pay: When you need a doctor and can’t pay. Getting ready: Get ready for your appointment.
- In an emergency: Help right now (988, 911). All our free tools.
Your heart, blood pressure, blood sugar, thyroid or blood, and not sure this is the right page? The pages on this site for a heart attack or stroke, blood pressure, AFib, heart failure, cholesterol, diabetes and prediabetes, the thyroid, anemia, sickle cell and menopause, on one list.
Other guides on this site that go with this page
Free to read. We chose these ourselves; no professional did. Each guide was written with AI and has not been reviewed by a professional. They are general information, not advice.
- Getting ready for thyroid tests: why, the blood tests, the imaging tests, and a nodule: getting ready for thyroid tests (blood tests for TSH, T4, T3 or antibodies, a thyroid ultrasound, a thyroid scan, an uptake test, or a needle biopsy of a nodule): why, the blood tests, the imaging tests, and a nodule.
- When you can’t afford your medicine: what to ask, the programs that help, and buying online safely: when you can’t afford your medicine: what to ask, generics, assistance programs, Medicare’s Extra Help, a plan that says no, and safe online pharmacies.
This page and its wording were written with AI (Claude) for Scarlet Beast (our AI policy). No doctor or nurse has reviewed it. The facts were read on October 20, 2026 on NIDDK’s (NIH) page Primary Hyperparathyroidism (last reviewed March 2019). The numbers (about 100,000 people a year in the United States; most often aged 50 to 60; women 3 to 4 times more often than men; about 8 out of 10 caused by one adenoma; the surgery guidelines; about 1 out of every 100 people with vocal-cord nerve damage; a yearly blood test and a bone density test every 1 to 2 years) are NIDDK’s, and we add none. Ours: the emergency room or 911 for sudden confusion, someone hard to wake, or vomiting so you cannot keep fluids down, and 988 (NIDDK’s page names neither); never stopping a prescribed medicine on your own; asking a surgeon about their experience; telling your doctor about family history; the lines to say; the card; the links to our other pages; and the order of the steps. What we left out: NIDDK’s references, its pictures, and its mention of a single study about who is affected by race. Nothing you tick or type here is saved or sent.