Diabetes & Endocrine Health
Understand diabetes, hormones, thyroid health and metabolic conditions — and learn when it may be time to see an endocrinologist.
Medical information reviewed by qualified healthcare professionals • Updated regularly
What Are Diabetes & Endocrine Conditions?
The endocrine system is a network of glands and organs that produce hormones. These hormones help regulate processes such as metabolism, blood sugar, growth, reproduction, calcium balance and many other body functions.
When hormone levels are too high or too low, or when the body does not respond to hormones normally, endocrine disorders can develop. Diabetes, thyroid disorders and several metabolic and hormone-related conditions fall within endocrinology.
Common Eye Problems: 7 Eye Conditions to Know
Eye conditions can affect vision, comfort, and overall eye health. Recognising common symptoms can help you seek appropriate care.
1. Refractive Errors
Refractive errors, including nearsightedness, farsightedness, and astigmatism, cause blurred vision. Glasses, contact lenses, or selected procedures can help correct them.
2. Cataracts
Cataracts cause clouding of the eye’s lens, leading to blurry vision, glare, faded colours, and difficulty seeing at night.
3. Glaucoma
Glaucoma damages the optic nerve and may cause vision loss. It can develop without early symptoms, making regular eye examinations important.
4. Dry Eye Disease
Dry eye occurs when tears do not adequately lubricate the eyes. Symptoms include burning, irritation, redness, and a gritty sensation.
5. Conjunctivitis (Pink Eye)
Conjunctivitis causes eye redness, watering, irritation, or discharge. It may result from infections or allergies.
6. Diabetic Eye Disease
Diabetes can damage retinal blood vessels and affect vision. Regular eye examinations are important because early damage may have no noticeable symptoms.
7. Age-Related Macular Degeneration (AMD)
AMD affects central vision and may cause difficulty reading, blurred vision, or straight lines appearing wavy.
These eye conditions have different causes and treatments. Consult an eye care professional for an appropriate assessment.
| Area | Examples |
|---|---|
| Blood sugar | Diabetes, prediabetes |
| Thyroid | Hypothyroidism, hyperthyroidism, thyroid nodules |
| Metabolism | Obesity, metabolic syndrome, lipid disorders |
| Reproductive hormones | PCOS, hormonal infertility, menopause-related disorders |
| Adrenal | Addison’s disease, Cushing’s syndrome |
| Pituitary | Pituitary hormone disorders |
| Bone & calcium | Osteoporosis, calcium disorders, vitamin D deficiency |
Meet Your Endocrine System
Your endocrine system includes glands throughout your body that produce hormones and help coordinate important body functions.
Select a gland
Choose a gland below or tap a highlighted area on the body to learn about its role.
How your endocrine system works
The endocrine system includes glands such as the thyroid, pituitary, adrenal glands, pancreas, parathyroids, ovaries and testes. These glands produce hormones that help coordinate many body functions.
Pituitary & Hypothalamus
The hypothalamus and pituitary gland help regulate and coordinate the activity of several other endocrine glands throughout the body.
Thyroid
Produces hormones that help regulate metabolism and other body functions.
Thymus
The thymus is involved in immune-system development and is particularly active during childhood.
Pancreas
Produces hormones including insulin and glucagon that help regulate blood glucose.
Adrenal Glands
Produce hormones including cortisol and aldosterone that influence several important body functions.
Ovaries / Testes
The ovaries and testes produce reproductive hormones that support reproductive function and other body processes.
What Are You Looking to Understand?
Explore common hormone, blood sugar, thyroid, metabolic and endocrine health concerns by topic.
Blood Sugar
Diabetes, prediabetes, high or low blood sugar
Thyroid
Hypothyroidism, hyperthyroidism, nodules and thyroid disorders
Weight & Metabolism
Weight changes, insulin resistance and metabolic conditions
Hormones & Reproductive Health
PCOS, menopause and hormone-related reproductive conditions
Bone & Calcium
Osteoporosis, calcium disorders and vitamin D-related concerns
Adrenal Hormones
Conditions involving cortisol and other adrenal hormones
Pituitary Hormones
Conditions affecting pituitary hormone production
Endocrine Tests
Blood sugar, HbA1c, thyroid and other hormone testing
Common Diabetes & Endocrine Conditions
Explore common conditions affecting blood sugar, thyroid function, metabolism, hormones, adrenal glands, pituitary function and calcium balance.
Blood Sugar & Diabetes
Conditions involving blood glucose, insulin production and insulin sensitivity.
Thyroid Conditions
Conditions affecting thyroid hormone production, thyroid structure and regulation.
Metabolic Conditions
Conditions affecting weight, metabolism, cholesterol and how the body processes energy and fats.
Hormonal Conditions
Hormone-related conditions involving reproductive health, growth and hormonal changes.
Adrenal, Pituitary & Calcium
Conditions involving adrenal hormones, pituitary function, parathyroid activity and calcium balance.
Endocrine conditions can have overlapping symptoms. A healthcare professional can recommend appropriate evaluation and testing based on your symptoms and medical history.
Are You Experiencing a Hormone or Metabolic Problem?
Some symptoms can be associated with endocrine or metabolic conditions, but many can also have other possible causes.
Extreme thirst
May relate to blood glucose or other conditions.
Frequent urination
Can occur with diabetes but has multiple possible causes.
Unexplained weight change
Can occur with thyroid, metabolic or other conditions.
Persistent fatigue
May have many causes, including some endocrine disorders.
Feeling unusually cold
Can occur with hypothyroidism.
Feeling unusually hot or sweaty
Can occur with hyperthyroidism and other conditions.
Changes in menstrual cycles
Can be associated with hormonal conditions including PCOS or thyroid disorders.
Increased hair growth or hair loss
May have hormonal or non-hormonal causes.
Neck swelling
Can be associated with thyroid enlargement or nodules.
Changes in blood sugar
May require evaluation depending on the pattern and circumstances.
Many symptoms can have endocrine and non-endocrine causes.
Diabetes & Blood Sugar
Diabetes affects how the body regulates blood glucose. Different types of diabetes have different underlying mechanisms and management needs.
Understanding the Main Types of Diabetes
Diabetes can develop for different reasons and can affect how your body produces or uses insulin and regulates blood glucose.
Type 1 Diabetes
Autoimmune destruction of insulin-producing pancreatic beta cells.
Learn about Type 1 Diabetes →Type 2 Diabetes
A condition involving insulin resistance and, over time, inadequate insulin production.
Learn about Type 2 Diabetes →Gestational Diabetes
Diabetes first recognized during pregnancy.
Learn about Gestational Diabetes →Prediabetes
Blood glucose levels are higher than normal but below the diagnostic threshold for diabetes.
Learn about Prediabetes →Want to understand diabetes in more detail?
Learn about symptoms, risk factors, diagnosis, treatment, monitoring and everyday diabetes management.
Thyroid Health
Hypothyroidism
When the thyroid doesn’t produce enough thyroid hormone.
Hyperthyroidism
When the thyroid produces too much thyroid hormone.
Thyroid Nodules
Lumps or growths within the thyroid that may require evaluation.
Goiter
An enlarged thyroid gland.
Hashimoto’s Disease
An autoimmune condition that can lead to hypothyroidism.
Graves’ Disease
An autoimmune condition that commonly causes hyperthyroidism.
How Are Hormone Disorders Diagnosed?
Diagnosis usually combines symptoms, medical history, examination and appropriate laboratory or imaging tests.
From Symptoms to a Care Plan
Symptoms
Your symptoms and concerns help guide the initial evaluation.
Medical history
Your health history, medicines and relevant family history may be reviewed.
Physical examination
A healthcare professional may perform an examination based on your symptoms.
Blood / urine tests
Laboratory tests can help assess glucose, hormones and other relevant markers.
Hormone-specific testing
Additional hormone tests may be selected according to symptoms and clinical findings.
Imaging when needed
Imaging may be used when a structural problem needs further evaluation.
Diagnosis
Findings are considered together to identify the likely condition or cause.
Individualized care plan
Management is planned according to the condition, symptoms and individual needs.
Tests May Depend on Your Symptoms
Not everyone needs every test. The appropriate evaluation depends on the clinical situation.
Blood glucose & diabetes
- Fasting glucose
- Random glucose
- HbA1c
- Oral glucose tolerance testing when appropriate
Thyroid
- TSH
- Free T4
- Other thyroid tests when indicated
- Thyroid antibodies in selected situations
Other endocrine testing
- Calcium
- Vitamin D
- Cortisol
- Other hormone tests depending on symptoms
Imaging
- Thyroid ultrasound
- Other imaging when clinically indicated
The exact tests used to evaluate a possible hormone disorder depend on your symptoms, examination findings and medical history.
Common Diabetes & Endocrine Tests
| Test | What it may help evaluate |
|---|---|
| HbA1c | Longer-term blood glucose |
| Blood glucose | Current blood glucose |
| TSH | Thyroid function screening |
| Free T4 | Thyroid hormone status |
| Thyroid antibodies | Certain autoimmune thyroid conditions |
| Calcium | Calcium balance |
| Vitamin D | Vitamin D status |
| Cortisol | Adrenal function in selected situations |
| Thyroid ultrasound | Thyroid structure/nodules |
When Should You See an Endocrinologist?
You may be referred to or seek an endocrinologist when you have:
- Diabetes requiring specialist management
- Difficult-to-control blood glucose
- Persistent abnormal thyroid tests
- Thyroid nodules or enlargement
- Unexplained hormonal abnormalities
- PCOS or certain reproductive hormone concerns
- Adrenal or pituitary disorders
- Calcium or bone metabolism problems
- Complex metabolic conditions
- Suspected endocrine disorders requiring specialized testing
An endocrinologist specializes in disorders of the endocrine system, including diabetes, thyroid, adrenal, pituitary and metabolic conditions.
Need Help Understanding a Hormone or Metabolic Problem?
An endocrinologist can evaluate symptoms, review relevant tests and help determine whether further endocrine assessment is appropriate.
Explore Diabetes & Endocrine Health
Explore common conditions, blood sugar concerns, thyroid disorders, hormonal conditions and important endocrine tests.
Diabetes
Understand diabetes, symptoms, types, treatment and ongoing management.
→Type 2 Diabetes
Learn about insulin resistance, blood sugar control and risk factors.
Prediabetes
Blood glucose levels above the normal range but below the diabetes range.
Hypothyroidism
Understand an underactive thyroid and common symptoms and tests.
Hyperthyroidism
Explore symptoms and conditions associated with excess thyroid hormone.
Thyroid Nodules
Learn what thyroid nodules are and how they may be evaluated.
PCOS
Explore hormonal and metabolic features associated with polycystic ovary syndrome.
Insulin Resistance
Understand how reduced insulin sensitivity can affect blood glucose regulation.
HbA1c
Learn how HbA1c reflects average blood glucose levels over time.
Diabetes & Endocrine FAQs
Find clear answers to common questions about diabetes, hormones, thyroid disorders and endocrine health.
Endocrinologists diagnose and manage disorders involving hormones and the endocrine system. Common areas include diabetes, thyroid disorders, adrenal and pituitary conditions, metabolic disorders and some bone and calcium disorders.
It is a network of glands and organs that produce and release hormones that help regulate many body functions.
Yes. Diabetes involves problems with insulin and blood glucose regulation and is commonly managed within endocrinology.
They include diabetes, thyroid disorders, metabolic conditions, adrenal disorders, pituitary disorders and certain bone and calcium disorders.
Symptoms vary greatly depending on the hormone involved. They may include changes in weight, energy, temperature tolerance, thirst, urination, menstrual cycles or other body functions. Many of these symptoms also have non-endocrine causes.
Depending on the suspected condition, doctors may use blood or urine tests, hormone testing, glucose testing and imaging such as thyroid ultrasound.
A general physician can evaluate many initial symptoms and may refer you to an endocrinologist when a specialized endocrine evaluation is appropriate.
Thyroid disorders can affect metabolism and may be associated with weight changes, although weight change has many possible causes.
Understand Your Health. Take the Next Step.
Whether you’re concerned about blood sugar, thyroid function, hormones or another metabolic problem, the right evaluation can help clarify what may be happening.
