Hypothyroidism

Hypothyroidism is a condition marked by an underactive thyroid gland. 

What are the symptoms of hypothyroidism?

Hypothyroidism is a common condition, which can go undetected if symptoms are mild. Hypothyroidism means the thyroid is underactive, producing insufficient amounts of thyroid hormones. Symptoms of hypothyroidism may be mild and may start slowly. The following are the most common symptoms of hypothyroidism:

  • Feeling tired

  • Unable to stand cold temperatures

  • Hoarse voice

  • Swelling of the face

  • Weight gain

  • Constipation

  • Skin and hair changes, including eyebrows

  • Carpal tunnel syndrome (hand tingling or pain)

  • Slow heart rate

  • Muscle cramps

  • Trouble concentrating

  • Irregular menstrual periods

The symptoms of hypothyroidism may resemble other conditions or medical problems. Always consult your doctor for a diagnosis.

How is thyroid function tested?

Screening for hypothyroidism involves a blood test that measures thyroid hormone (thyroxine, or T4) and serum TSH (thyroid-stimulating hormone) levels. Hypothyroidism is often suspected when TSH levels are above normal and T4 levels are below normal. Always consult your doctor for a diagnosis.

Who should undergo thyroid function screening?

Routine screening for hypothyroidism during pregnancy is not recommended. Anyone with symptoms of hypothyroidism, a history of hypothyroidism or with related conditions (for example, diabetes) should be screened.