The key warning signs of hyperparathyroidism often include lasting fatigue, bone and joint pain, kidney stones, extra thirst, frequent urination, constipation, foggy thinking, and low mood. These clues can look like stress, aging, or “just being tired,” so overactive parathyroid glands are easy to miss.
When these symptoms persist or occur together, it may be worth analyzing calcium and parathyroid hormone levels with a healthcare professional. Recognizing the signs early can help you get the right testing and treatment before complications develop.
The parathyroid glands are four tiny, rice-sized glands located behind the thyroid in your neck. Despite their name and location, they are not part of the thyroid and have a completely different job. The parathyroid glands control the amount of calcium in your blood by making a hormone called parathyroid hormone (PTH).
Hyperparathyroidism happens when one or more parathyroid glands make too much PTH. This can cause calcium levels in the blood to rise too high, a condition called hypercalcemia. Over time, high calcium and excess PTH can affect your bones and kidneys and may also cause symptoms involving your digestive system, muscles, nerves, and brain.
The symptoms are famously described as “bones, stones, groans, and psychic moans.” They can mimic other common conditions, so the diagnosis can take years. Watch for clusters of problems, not a single complaint.
Many patients experience a mix of physical and cognitive symptoms that worsen over time and can significantly affect quality of life.
“Bones” (skeletal): PTH pulls calcium from the skeleton, leading to osteopenia or osteoporosis, thinning bones, fractures (including after a minor fall), persistent bone pain, or aching joints. Bone loss can stay silent until a density scan or a break.
“Stones” (kidney): Excess calcium can crystallize into painful kidney stones, sometimes more than once. Related signs include frequent urination (especially at night) and increased thirst as the body tries to flush out calcium. Stones may be the first loud signal.
“Groans” (abdominal): High calcium can disrupt digestion, causing abdominal pain, nausea, vomiting, loss of appetite, constipation, or belly discomfort. In some cases, it can contribute to pancreatitis.
“Psychic moans” (neurological and cognitive): Profound fatigue that sleep does not fix, depression, anxiety, irritability, a shorter temper, memory problems, brain fog, trouble concentrating, poor sleep, slower thinking, and a sense of being “not yourself.”
Other clues include muscle weakness or a heavy feeling in the limbs, and blood pressure that is hard to explain.
Keep a simple log for two to four weeks. Note energy, pain, stones, thirst, bathroom trips at night, and mood. Bring it to your visit—patterns help more than a single bad day.
Most day-to-day complaints are driven by hypercalcemia. One high calcium result is not a diagnosis – it is a signal to repeat the test and check PTH, vitamin D, and kidney function.
Additional signs include muscle weakness, high blood pressure, heart palpitations or arrhythmias, and a general feeling of being unwell (malaise).
Mild hypercalcemia may cause only fatigue, mild thirst, or constipation. Moderate levels can add nausea, more urination, and bone aches.
Very high calcium needs urgent medical care. It can cause severe dehydration, confusion, or heart rhythm problems. That extreme picture is less common when primary hyperparathyroidism is found on a routine lab panel, but it still matters.
Calcium pulls water into the urine, which is why people drink more and wake at night. Extra calcium in the urine raises the chance of stones. Calcium leaving the bones raises the chance of osteoporosis.
A significant number of people are called “asymptomatic,” often discovered by accident on routine blood work that shows high calcium. In the past, doctors waited for obvious stones or fractures before acting. Luckily, modern preventative medicine makes it easier to identify this condition at early stages. Here is why early testing is important:
High calcium can still silently damage bones and the cardiovascular system, even without classic events like kidney stones.
People called asymptomatic often still have fatigue, brain fog, or poor sleep. Many who believed they were asymptomatic report feeling dramatically better after treatment – sharper and stronger – realizing those symptoms were the disease.
Write down what you notice, even if it seems small. Share it during your consultation so the full picture is clear.
Diagnosis starts with blood work, not a neck exam. Primary hyperparathyroidism is confirmed when tests show high (or high-normal) calcium with a PTH level that is high or not properly suppressed at the same time.
Vitamin D, kidney function, and phosphate are often checked too. A 24-hour urine calcium test helps separate primary hyperparathyroidism from a look-alike condition called familial hypocalciuric hypercalcemia.
Once the biochemical diagnosis is made, imaging locates which of the four glands is overactive. Imaging comes after the blood diagnosis.
At American Endocrine, advanced diagnostic tests pinpoint the problematic gland before any intervention is planned. Same-day neck ultrasounds are part of our parathyroid workup, which can shorten the path from labs to a plan.
Neck ultrasound: A non-invasive imaging test that uses sound waves to visualize the glands in the neck.
Sestamibi scan: A nuclear medicine scan in which a small amount of radioactive tracer is injected and absorbed by the overactive gland, making it visible on imaging.
4D parathyroid CT scan: A specialized CT scan that provides detailed anatomical information about the neck and the location of the glands.
Helpful records to have on hand: recent laboratory results, imaging and ultrasound reports, notes from an endocrinologist or primary care physician, bone density results, and referrals.
Schedule a specialist consultation if you have a combination of the symptoms above or have been told you have high blood calcium, even if you feel fine. Do not wait for every classic symptom. Primary hyperparathyroidism is often found on a chemistry panel ordered for another reason.
A high calcium result on any blood test, even without symptoms
Repeated kidney stones
Unexplained bone loss, fractures, or ongoing bone pain
Lasting fatigue, brain fog, cognitive issues, or constipation
Go to urgent or emergency care for severe vomiting, confusion, extreme thirst, or a very high calcium level.
Dr. Hyunsuk Suh is an endocrine surgeon who focuses exclusively on diseases of the thyroid, parathyroid, and adrenal glands, specializing in robotic surgery.
American Endocrine sees patients in Johns Creek, GA, and in the Tampa, FL, area. Call (770) 599-5710 (Atlanta) or 813-576-1668 (Tampa area).
If you have already been evaluated elsewhere, our team is available for a second opinion. To ensure a productive consultation, our office will require your relevant medical records, including referrals, recent lab results, and any imaging reports.
For primary hyperparathyroidism, the only definitive cure is a surgical procedure called a parathyroidectomy. The surgeon removes the overactive adenoma or enlarged glands, leaving healthy glands in place so PTH and calcium can return to normal.
The first step is a focused workup: confirm the numbers, check bones and kidneys, and locate the overactive gland when surgery is likely.
Mild disease is sometimes observed with repeat labs and bone checks. Many people – especially those with stones, bone loss, declining kidney function, or calcium clearly above the normal range – are candidates for parathyroidectomy.
Most patients experience a rapid improvement in symptoms and a halt to the long-term damage caused by hypercalcemia, so bones, kidneys, and energy can recover.
American Endocrine provides specialized, minimally invasive parathyroid care, with locations in Johns Creek and the Tampa area.
Recognizing warning signs like fatigue, bone pain, kidney stones, thirst, frequent urination, constipation, and changes in mood or memory can lead to earlier testing and a clearer plan. Some people have few obvious complaints, so calcium and PTH labs matter as much as how you feel. Imaging then maps the gland if surgery is on the table.
Call (770) 599-5710 (Atlanta) or 813-576-1668 (Wesley Chapel, Tampa area) to ask whether monitoring or parathyroidectomy is the right next step.
About the Author
Dr. Hyunsuk Suh, MD
With over two decades of surgical experience, Dr. Suh is a pioneer in robotic endocrine procedures. His groundbreaking work includes the first robotic bilateral approach (BABA) thyroidectomy and the first scarless lymph node neck dissection for advanced thyroid cancer. He has authored over 35 peer-reviewed articles and presented at more than 100 international conferences.
Empowering
Women’s Health
By Dr. Hyunsuk Suh, MD
September 7, 2026
