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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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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Graves' disease

In this autoimmune condition, the thyroid gland in the neck produces too much thyroid hormone that can cause tremor, anxiety, a racing heart, goitre and bulging eyes.

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Hyperthyroidism

Hyperthyroidism (or thyrotoxicosis) occurs when the thyroid gland is overactive and produces too much thyroid hormone.

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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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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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Diabetic ketoacidosis

Information about diabetic ketoacidosis, a condition caused when you have a high blood sugar level, and not enough insulin in your body to break it down to use for energy .

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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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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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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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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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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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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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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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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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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 for a diabetes screening test.

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Human growth hormone

Human growth hormone is a small protein that travels in the bloodstream to stimulate growth. Learn more about the medical uses of human growth hormone.

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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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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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The role of cortisol in the body

Cortisol is a stress hormone with many important functions. Find out what happens if you have too little or excess cortisol and about corticosteroid drugs.

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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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Diabetic retinopathy

Discover how diabetes can slowly damage your retina (the back of your eye). This can lead to diabetic retinopathy and vision problems.

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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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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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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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