Thyroid, under-active

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Hypo- means 'under' or 'insufficient'. The thyroid gland produces hormones that keep the metabolism functioning effectively. Hypothyroidism describes the general effects of a severely under active thyroid gland; where not enough hormones are produced to keep the body functioning properly.

The adult form of this condition, which affects women five times as often as men, is also known as myxoedema.

Hypothyroidism in children can be present from birth (congenital hypothyroidism) or may develop in infancy. It is more common in adults from middle age.

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