The thyroid is a small, butterfly-shaped gland in the front of your neck that makes two thyroid hormones: thyroxine (T4) and triiodothyronine (T3). Thyroid hormones control how the body uses energy. Many people with thyroid disease aren’t aware of their disorder because they haven’t been tested. If you have definite symptoms of thyroid disorders (underactive or overactive), you should talk to your doctor about being tested. Health care professionals use thyroid tests to check how well your thyroid is working and to find the causes of possible problems. Thyroid tests help health care professionals diagnose thyroid diseases such as hyperthyroidism, Graves’ disease, hypothyroidism, Hashimoto’s disease, thyroid nodules and thyroid cancer.
Whatever your type of thyroid disorder, it can make you feel more emotional than you felt before and you may find that your mood changes, sometimes rapidly and unpredictably. Common emotional problems are:
You may need a TSH test if you have symptoms of hyperthyroidism (too much thyroid hormone in your blood), or hypothyroidism (too little thyroid hormone). One of these tests is called the thyroid stimulating hormone (TSH) test. When thyroid disease is caught early, treatment can control the disorder even before the onset of symptoms. Symptoms of hyperthyroidism and hypothyroidism include:
High TSH levels can mean your thyroid is not making enough thyroid hormones, a condition called hypothyroidism. Low TSH levels can mean your thyroid is making too much of the hormones, a condition called hyperthyroidism. A TSH test does not explain why TSH levels are too high or too low. If your test results are abnormal, your health care provider will probably order additional tests to determine the cause of your thyroid problem. These tests may include:
Hyperthyroidism
Hypothyroidism:
https://my.clevelandclinic.org/health/diseases/17557-thyroid-disease-description
http://www.btf-thyroid.org/information/leaflets/37-psychological-symptoms-guide
https://my.clevelandclinic.org/health/diseases/8541-thyroid-disease
https://medlineplus.gov/lab-tests/tsh-thyroid-stimulating-hormone-test/
https://www.niddk.nih.gov/health-information/diagnostic-tests/thyroid
https://www.health.harvard.edu/womens-health/do-you-need-a-thyroid-test