Hypoparathyroidism
1 medicine
Hypoparathyroidism is a condition where the parathyroid glands produce too little PTH, causing low blood calcium and a range of nerve and muscle symptoms, managed with calcium and vitamin D analogues.
Key facts
- Hypoparathyroidism occurs when the parathyroid glands produce insufficient parathyroid hormone (PTH), leading to abnormally low blood calcium.
- It is an uncommon but chronic condition, and low calcium causes nerve and muscle overexcitability: tingling, cramps and, in severe cases, painful spasms called tetany.
- Because PTH is not routinely replaced, treatment focuses on supplemental calcium and activated vitamin D analogues such as alfacalcidol.
- Doses are adjusted based on regular blood tests, so ongoing monitoring is a permanent part of managing the condition.
What low calcium feels like
The hallmark symptoms arise from nerve and muscle overexcitability caused by hypocalcaemia. These include tingling or numbness around the mouth and in the hands and feet, muscle cramps, and, in severe cases, painful involuntary muscle spasms called tetany. Some people also notice anxiety, brain fog or fatigue. A sudden worsening with severe muscle spasms or difficulty breathing warrants urgent medical attention.
What causes it
Hypoparathyroidism most often follows damage to or removal of the parathyroid glands during neck or thyroid surgery. Less common causes include autoimmune destruction of the glands, genetic conditions, and severe magnesium deficiency, which can stop the glands from working properly even when they are structurally normal.
Managing calcium over the long term
Because PTH itself is not routinely replaced, treatment focuses on raising calcium through supplemental calcium and activated vitamin D analogues. Alfacalcidol is a commonly used option: it bypasses the kidney activation step that PTH normally drives, making it particularly suitable when PTH is absent. These medicines fall under bone health management, and doses are adjusted based on regular blood tests to avoid both under- and over-correction.
When to see a doctor
See a doctor for tingling, cramping or muscle spasms that suggest low calcium, and seek urgent care if spasms become severe or breathing is affected. Anyone diagnosed with hypoparathyroidism needs regular blood tests to keep calcium in a safe range long-term.
This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.