Hypothyroidism – what are the signs of an underactive thyroid?

Hypothyroidism
Hypothyroidism

Many symptoms of an underactive thyroid (hypothyroidism) are the same as those of other conditions, so it can easily be confused for something else.

Symptoms usually develop slowly and you may not realise you have a medical problem for several years.

Common symptoms include:

tiredness

being sensitive to cold

weight gain

constipation

depression

slow movements and thoughts

muscle aches and weakness

muscle cramps

dry and scaly skin

brittle hair and nails

loss of libido (sex drive)

pain, numbness and a tingling sensation in the hand and fingers (carpal tunnel syndrome)

irregular periods or heavy periods

Elderly people with an underactive thyroid may develop memory problems and depression. Children may experience slower growth and development. Teenagers may start puberty earlier than normal.

If you have any of these symptoms, see your GP and ask to be tested for an underactive thyroid.

Read more about getting tested for an underactive thyroid.

If an underactive thyroid isn’t treated

It’s unlikely that you’d have many of the later symptoms of an underactive thyroid, because the condition is often identified before more serious symptoms appear.

Later symptoms of an underactive thyroid include:

a low-pitched and hoarse voice

a puffy-looking face

thinned or partly missing eyebrows

a slow heart rate

hearing loss

anaemia

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