Hypoparathyroidism

Also called Underactive parathyroid or Low calcium

Hypoparathyroidism is when the parathyroid glands in the neck produce too little parathyroid hormone, leading to low calcium levels in the blood. The most common cause is damage to the glands during neck surgery, such as thyroid surgery. It can also be caused by autoimmune or genetic conditions.

Last updated Nov 9, 2026

What it is

It may be temporary after surgery or permanent.

Treatment usually involves calcium and active vitamin D tablets, with regular blood tests. Some people need hormone replacement.

Common signs

  • Tingling or numbness in the fingers, toes or around the mouth
  • Muscle cramps or spasms
  • Tiredness
  • Low mood or anxiety
  • Brain fog

How it is usually diagnosed

  • Blood tests for calcium, parathyroid hormone, magnesium and phosphate

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Calcium results over time
  • Doses of calcium and vitamin D
  • Surgery letters
  • Endocrinology letters

Questions to ask your doctor

  • Is this likely to be permanent?
  • What calcium level should I aim for?
  • What should I do if I get tingling or cramps?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Severe muscle spasms, seizures or difficulty breathing: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources