The thyroid gland is found at the front of the neck. It produces hormones that control vital functions such as heart rate and body temperature. These hormones are regulated by Thyroid Stimulating Hormone.
An overactive thyroid is when the thyroid gland produces too much of the thyroid hormones. This condition is called hyperthyroidism. Few common signs of hyperthyroidism are nervousness, anxiety and irritability, hyperactivity(you may find it hard to stay still and feel full of nervous energy), mood swings, difficulty sleeping, feeling tired all the time, sensitivity to heat, muscle weakness, diarrhoea, needing to pee more often than usual persistent thirst.
Anyone can have an overactive thyroid but women are 10 times more likely to have one than men. The problem typically starts between 20 and 40 years of age.
An underactive thyroid gland is where your thyroid gland doesn’t produce enough hormones. This condition is called hypothyroidism. Few common signs of hypothyroidism are tiredness, being sensitive to cold, weight gain, constipation, depression, low movements and thoughts, muscle aches and weakness, muscle cramps, dry and scaly skin, brittle hair and nails
What we test
By checking the levels of Thyroid Stimulating Hormone (TSH), we can predict the levels of hormone the thyroid is producing. The results along with the associated symptoms help a healthcare professional in deciding the activity of the thyroid gland.
Information about Hypothyroidism : http://www.nhs.uk/conditions/Thyroid-under-active/Pages/Introduction.aspx
Information about Hyperthyroidism: http://www.nhs.uk/conditions/Thyroid-over-active/Pages/Introduction.aspx