Hypercalcemia: Causes, Symptoms, and Treatment
Written by Achuta Uppu, MD. Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Hypercalcemia?
A primary care doctor often finds high calcium on a routine blood test. An endocrinologist, a doctor who treats hormone and gland problems, often helps when the parathyroid glands are the cause. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is hypercalcemia?
Hypercalcemia means you have too much calcium in your blood. Your body needs calcium so that you can use your muscles. Calcium also keeps your bones and teeth strong and your heart healthy.
Two things help control calcium in the body: parathyroid hormone, called PTH, and vitamin D. The parathyroid glands are four small glands in the neck, behind the thyroid gland, and they make PTH.
Symptoms
Most people have no symptoms. The condition is most often found with routine blood tests.
When symptoms happen, they can vary with the cause. They may include:
- Nausea or vomiting, poor appetite, or constipation.
- More thirst or needing to urinate more often.
- Muscle weakness or twitches.
- Feeling tired or confused.
- Bone pain and fragile bones that break more easily.
Over a long time, high calcium can lead to kidney stones and kidney failure. It can also lead to weak bones (osteoporosis), broken bones, depression, and trouble concentrating. These problems are uncommon today in many countries.
Causes and who gets it
The most common cause is too much PTH from the parathyroid glands. This happens when one or more of the glands are enlarged, or when a growth forms on a gland. Most of the time, these growths are not cancer.
Your calcium can also run high if your body is low on fluids or water. Other causes include:
- Cancers such as lung and breast cancer, or cancer that has spread to other organs.
- Too much vitamin D in your blood.
- An overactive thyroid gland.
- Chronic kidney disease or kidney failure.
- Medicines such as thiazide diuretics (water pills) and lithium.
- An inherited condition that affects how the body manages calcium.
People of all ages can have high calcium, but it is most common in women over age 50, after menopause.
How doctors diagnose it
An accurate diagnosis is needed. Doctors check blood levels of calcium, PTH, PTH-related protein, and vitamin D. They may also measure calcium in a urine sample collected over 24 hours. People with kidney stones should have tests to check for high calcium.
Treatment
Treatment is aimed at the cause whenever possible. People with overactive parathyroid glands may need surgery to remove the abnormal gland. This surgery will cure the high calcium.
Severe high calcium that causes symptoms can need a hospital stay. Fluids through a vein are the most important treatment there. Other treatments include calcitonin, dialysis if kidney damage is involved, water pills (diuretics), steroids, and bisphosphonates, which are medicines that stop bone breakdown.
The outlook is good if the parathyroid problem is mild or the cause can be treated.
After a hospital stay, follow your provider's plan to keep calcium from rising again:
- Drink as much water each day as your provider recommends.
- Do not use antacids that have a lot of calcium in them.
- Ask your provider which medicines and herbs are safe for you.
- Expect blood tests after you go home.
When to see a doctor
Contact your provider if you have symptoms of high calcium, or a family history of high calcium or overactive parathyroid glands.
After hospital treatment, contact your provider if you have any of these symptoms:
- Headaches.
- Irregular heartbeats.
- Nausea or vomiting.
- Increased thirst or dry mouth.
- Little or no sweating.
- Dizziness.
- Blood in the urine.
- Dark urine.
- Pain on one side of your back.
- Abdominal pain.
- Severe constipation.
Call 911 or go to the emergency room if you have chest pain that lasts two minutes or more, trouble breathing, or fainting. Do the same for sudden confusion or a change in how alert you are, or for vomiting that is severe or will not stop.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either kind of doctor can order blood tests and review your medicines and supplements. They can also follow your results over time and coordinate care with specialists.
Common questions
Does hypercalcemia always cause symptoms?
No. Most people have no symptoms, and the condition is most often found with routine blood tests. When symptoms happen, they can include nausea, constipation, extra thirst, muscle weakness, and bone pain.
Can hypercalcemia be prevented?
Most causes of high calcium cannot be prevented. Anyone with symptoms should have their blood calcium level checked. If you take calcium and vitamin D supplements, talk to your provider about how much is right for you.
Can hypercalcemia be cured?
It depends on the cause. If an abnormal parathyroid gland is the cause, surgery to remove it will cure the high calcium. The outlook is good if the problem is mild or the cause can be treated.
Sources
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
