Underactive thyroid (hypothyroidism)Diagnosis
It's very important that an underactive thyroid (hypothyroidism) is diagnosed as soon as possible.
An underactive thyroid is where your thyroid gland (a small gland in your neck) does not produce enough hormones.
An underactive thyroid is treated with medicine that raises the level of thyroid hormone in your body.
Symptoms of an underactive thyroid include feeling tired all the time, gaining weight and being sensitive to cold.
Page last reviewed: 27/04/2018
Next review due: 27/04/2021