Hormonal system

The endocrine (hormonal) system influences your metabolism, growth and other functions. Learn more about what it is and related conditions.

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Endocrine glands and their hormones

Find out more about the endocrine glands and hormones in your body, such as the pituitary gland, thyroid gland and adrenal glands.

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Oxytocin

Oxytocin is a hormone that plays an important role in both the female and male reproductive system.

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Thyroid problems

If your thyroid becomes overactive (hyperthyroidism) or underactive (hypothyroidism), you may experience a range of health problems — learn more here.

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Adrenal fatigue

Adrenal fatigue is a term used to explain tiredness and sleep problems. Find out about the symptoms of adrenal fatigue and how to treat it.

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Pineal gland

Find out about the pineal gland. This is a very small gland in your brain that makes the hormone melatonin, which controls your internal body clock.

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Thyroid medicines

Thyroid medicines treat thyroid disorders, including hypothyroidism and hyperthyroidism. Read about how they work and their potential side effects.

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Addison's disease

In Addison's disease the adrenal glands don't make enough cortisol and aldosterone. Read about symptoms, causes, diagnosis and treatment.

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Goitre

Goitre is a swelling of your thyroid gland at the base of your neck. Find out more about the causes, symptoms and treatments for goitre.

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Hashimoto's disease

Hashimoto's disease causes your body to produce too little thyroid hormone. Learn about the causes, symptoms and treatment of Hashimoto's thyroiditis.

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Primary aldosteronism

Primary aldosteronism is a condition where you make too much of the hormone aldosterone — find out about the symptoms, causes and treatments.

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Graves' disease

Graves' disease is an autoimmune disease causing hyperthyroidism, with symptoms like anxiety, tremors, a racing heart, goitre and bulging eyes.

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Hypothyroidism

Hypothyroidism (underactive thyroid) is when the thyroid gland doesn't make enough thyroid hormone. Read about symptoms, diagnosis and treatment.

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Cushing's syndrome

Cushing's syndrome is a hormonal disorder with a wide range of symptoms. Learn what causes Cushing's syndrome and why it is difficult to diagnose.

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Thyroid cancer

Thyroid cancer is treatable in most cases. Learn about its development, symptoms, when to consult a doctor, and available treatments.

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Follicle stimulating hormone

Follicle stimulating hormone (FSH) is made by the pituitary gland in the brain. Find out what it does and when your FSH blood level may be tested.

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Endocrine disorders and diseases

Endocrine diseases and disorders range in severity, and can be very common, like diabetes, or very rare, like gigantism. Learn more about a range of these conditions here.

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Hyperthyroidism

Hyperthyroidism (thyrotoxicosis) is when the thyroid gland is overactive and produces too much thyroid hormone. Learn about symptoms and treatment.

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The role of an endocrinologist

Endocrinologists are specialists who treat hormone-related conditions. Learn how to find one and important questions to ask before your appointment.

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Diabetes screening tests

You can have diabetes without any symptoms at all. If you are at a high risk of diabetes, ask your doctor about diabetes screening tests.

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Gigantism

Gigantism is a rare condition that causes children to grow abnormally fast and tall. It can be treated successfully, but there may still be symptoms.

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Total thyroidectomy (for thyrotoxicosis)

The thyroid is a gland in your neck that produces a hormone called thyroxine, which regulates your body's metabolism. The thyroid can become overactive, causing weight loss, sweatiness and eye problems.

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Thyroid gland

Your thyroid gland sits in the front of your neck and helps control your metabolism. Read about the different thyroid hormones and thyroid problems.

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Thyroid function tests

A thyroid function blood test is used to check your thyroid stimulating hormone (TSH), thyroxine (T4), and triiodothyronine (T3) blood levels.

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Adrenal glands

Find out about your adrenal glands, which sit on top of your kidneys and make several important hormones, including adrenaline and cortisol.

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HbA1c test

Find out about the HbA1c test — a type of blood test used to help diagnose diabetes and monitor blood sugar control in people with diabetes.

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Congenital adrenal hyperplasia

Congenital adrenal hyperplasia affects your adrenal glands and causes imbalances in the levels of certain hormones. It can be mild or severe.

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Iodine deficiency

Iodine deficiency is the most common cause of thyroid disease. Learn about the causes and how to ensure you are getting enough iodine.

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Thyroidectomy

A thyroidectomy is the removal of part or all of your thyroid gland. It’s used to treat an enlarged or overactive thyroid gland or thyroid cancer.

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Thyroidectomy for suspected cancer (nodule)

A thyroid lump can be caused by cancer. A thyroidectomy involves removing all or part of your thyroid gland. This gives you the best chance of being free of cancer, and helps your surgeon to decide if you need any further treatment.

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