In a study published in February in the journal Scientific Reports , researchers looked at data from wide-ranging voluntary health examinations performed on Taiwanese adults.
This number includes participants with both subclinical hypothyroidism — in which TSH is elevated but thyroid hormone levels are normal — who were 2.
Uncontrolled hypothyroidism can damage your peripheral nerves, which carry information from your brain and spinal cord to the rest of your body. One reason for this may be fluid retention, which puts excess pressure on the nerves. Symptoms of peripheral neuropathy often include pain, numbness, or tingling in your arms or legs, and may also include muscle weakness or partial loss of muscle control. But peripheral neuropathy is most likely to be caused by something other than hypothyroidism.
Mental and emotional difficulties are common in hypothyroidism. Hypothyroidism can also contribute to depression. In these cases, treatment with thyroid hormone can help reverse depressive symptoms.
In a study published in March in the journal Endocrine Research , people with subclinical hypothyroidism were given a depression assessment and then randomly assigned to take either thyroid hormone or a placebo inactive pill.
After 12 weeks, depression scores improved significantly in the thyroid hormone group, but not in the placebo group. In many women with hypothyroidism, menstrual periods become irregular and unpredictable. This can have a negative impact on fertility , as can the autoimmune problems that often cause hypothyroidism.
In a study published in January in the Endocrine Journal , 69 infertile women with subclinical hypothyroidism were given thyroid hormone treatment. After this, These include:. These problems can usually be avoided with treatment under the guidance of a specialist in hormone disorders an endocrinologist. Therefore, tell a GP if you have an underactive thyroid and you're pregnant or trying to get pregnant. In very rare cases, a severe underactive thyroid may lead to a life-threatening condition called myxoedema coma.
This is where the thyroid hormone levels become very low, causing symptoms such as confusion, hypothermia and drowsiness. Myxoedema coma requires emergency treatment in hospital. It's usually treated with thyroid hormone replacement medicine given directly into a vein.
These children are also more prone to serious intellectual and developmental problems. Infants with untreated hypothyroidism present at birth are at risk of serious problems with both physical and mental development.
But if this condition is diagnosed within the first few months of life, the chances of normal development are excellent. Mayo Clinic does not endorse companies or products.
Advertising revenue supports our not-for-profit mission. This content does not have an English version. This content does not have an Arabic version. Overview Hypothyroidism underactive thyroid is a condition in which your thyroid gland doesn't produce enough of certain crucial hormones. Thyroid gland Open pop-up dialog box Close. Thyroid gland Your thyroid gland is located at the base of your neck, just below the Adam's apple. More Information Hypothyroidism and joint pain? Request an Appointment at Mayo Clinic.
More Information Hypothyroidism symptoms: Can hypothyroidism cause eye problems? Share on: Facebook Twitter. Show references AskMayoExpert. Rochester, Minn. Chaker L, et al. The Lancet. American Thyroid Association. Accessed Oct. Jameson JL, et al. In: Harrison's Principles of Internal Medicine. New York, N. Ferri FF. In: Ferri's Clinical Advisor
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