Tingling, Cramps and Calcium After Thyroidectomy

Tingling around your mouth, fingers or toes, or muscle cramps, in the days after a thyroidectomy usually mean your calcium level has dropped. It is common: about 1 in 4 people have a temporary drop after a total thyroidectomy, and most recover within weeks to a couple of months. Contact your surgical team or GP the same day, or go to your emergency department. If you have trouble breathing or swallowing, or a seizure, call 000.

If you have just come home from thyroid surgery and your lips feel pins-and-needles, here is what is happening, what is normal, and when to act.

Why calcium drops after thyroid surgery

Four small parathyroid glands sit beside the thyroid and control the calcium level in your body. During a total thyroidectomy they can be bruised, have the tiny vessels that feed them disturbed, or occasionally be removed. When they slow down, your calcium level falls.

Removing lymph nodes from the central neck, which is common in thyroid cancer surgery, can raise the risk. How much depends on the operation and the surgeon, and an Australian and New Zealand registry found the extra risk can be small in experienced hands.

What it feels like

The usual first signs are:

• tingling or numbness around your mouth, in your fingers or in your toes
• muscle cramps or twitching
• sometimes headaches

Calcium usually reaches its lowest point one to three days after surgery, so symptoms can start once you are home.

When to get help

• Tingling, numbness or cramps: contact your surgical team or GP the same day, or go to your local emergency department. You will usually need a calcium test and medication to correct it.
• Call 000 if you have trouble breathing or swallowing, a seizure, or you faint.

Do not wait to see whether tingling settles on its own. Low calcium is easy to correct when it is caught early.

Is it permanent?

Usually not. In a large study of more than 1,000 people after total thyroidectomy, 70% of those with low parathyroid hormone straight after surgery recovered within two months, and a few more recovered between six and twelve months.

In specialist centres, about 1 to 3 in 100 people need long-term treatment. Some whole-country studies suggest the true number may be higher. Doctors usually call it long-term if it has not recovered by six to twelve months, and some people recover even later.

What your team usually does

Many people go home on calcium tablets for a short time. Some units give them only if a test shows they are needed. If your calcium is low, your team may also prescribe calcitriol, an activated form of vitamin D, and check your magnesium and vitamin D levels, because both affect how your parathyroid glands and calcium work.

Two things matter while you are on these medicines:

• Do not stop or change them yourself. The Australian information for calcitriol says stopping suddenly can lead to a rapid fall in calcium. Too much calcium is also a problem, so your team adjusts the doses as you recover.
• Check before adding anything. If you take calcitriol, its prescribing information says other vitamin D products should be avoided during treatment, so talk to your doctor before taking any supplement that contains vitamin D or calcium.

Calcium tablets and levothyroxine

Many people take both after a total thyroidectomy, and they need to be kept apart. Calcium tablets reduce how much levothyroxine you absorb. In one study, taking calcium with levothyroxine raised TSH enough over three months that 1 in 5 people went above the normal range.

The advice on how far apart differs by source:

• The Australian levothyroxine prescribing information says several hours.
• About four hours is the most common advice from doctors and the Australian Thyroid Foundation.
• Cancer Council says at least two hours.

Follow the timing your own team gave you, and ask your pharmacist to help you plan the day, especially if your calcium is prescribed with meals. Breakfast itself only needs to wait 30 to 60 minutes after your levothyroxine. The longer gap is for calcium, iron and some other minerals and antacids, not food. Our guide to supplements and levothyroxine timing explains more.

Does food calcium help?

Calcium from food counts, but it does not replace prescribed tablets, and there is no evidence that diet or any supplement speeds up parathyroid recovery. The Endocrine Society of Australia's patient information says there are no proven natural remedies for low parathyroid function, and to discuss anything you want to try with your doctor.

Questions to ask your team

1. Was my calcium or parathyroid hormone checked after surgery, and what were the results?
2. How long should I expect to take calcium, and when will it be reviewed?
3. How should I time my calcium tablets around my levothyroxine?
4. Should my magnesium or vitamin D be checked?
5. What symptoms mean I should come straight back?

Where ThyroBase fits

No food, supplement or powder speeds up parathyroid recovery or replaces your calcium medicines. ThyroBase contains added vitamin D and minerals, so if you take calcitriol or calcium tablets, check with your doctor before starting it. It is a daily morning and evening nutrition powder for people living with Hashimoto's, an underactive thyroid or no thyroid, designed to sit alongside your thyroid medication, never instead of it. Here is who ThyroBase is, and is not, designed for.

Tingling after thyroid surgery is common, and usually temporary.

Act on it the same day, and never adjust your calcium on your own.

Frequently asked questions

Why do my lips and fingers tingle after a thyroidectomy?

It usually means your calcium level has dropped because the parathyroid glands beside your thyroid were affected during surgery. About 1 in 4 people have a temporary drop. Contact your surgical team or GP the same day, or go to your emergency department.

How long does low calcium last after thyroid surgery?

For most people it settles within weeks to a couple of months. Doctors usually call it long-term if it has not recovered by six to twelve months, which happens to about 1 to 3 in 100 people in specialist centres, and some people recover even later.

How far apart should calcium and levothyroxine be?

Calcium reduces how much levothyroxine you absorb, so they need to be kept apart. The Australian prescribing information says several hours, about four hours is common advice, and Cancer Council says at least two hours. Follow your own team's timing and ask your pharmacist to help plan it.

When is low calcium an emergency?

Call 000 if you have trouble breathing or swallowing, a seizure or you faint. Tingling, numbness or cramps on their own still need attention the same day from your surgical team, GP or emergency department.

The honest takeaway

A drop in calcium after a total thyroidectomy is common and usually temporary, but it needs prompt attention, not waiting it out. Know the early signs, act the same day, keep your calcium and levothyroxine apart the way your team advises, and never change your calcium medicines on your own. For most people, the tingling is a few weeks of their story, not the rest of it.

ThyroBase is a nutritional supplement and is not intended to diagnose, treat, cure, or prevent any disease. It is designed to sit alongside your thyroid medication, not replace it. This article is general information, not medical advice. Never start, stop or change a supplement or prescription medication without speaking to your doctor or pharmacist first.

References

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