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Type 2 diabetes can develop gradually, and many people do not notice obvious symptoms at first. Some people feel more tired than usual, need to urinate more often, feel unusually thirsty or notice blurred vision, but may assume it is due to stress, ageing, poor sleep or a busy lifestyle.
The important thing to know is that symptoms alone cannot confirm diabetes. A blood test is needed to check whether blood glucose levels are higher than they should be.
In Australia, type 2 diabetes is a major and growing health concern. The Australian Institute of Health and Welfare estimates that around 1.3 million Australians were living with diabetes in 2022, with type 2 diabetes making up the large majority of cases. (aihw.gov.au)
The good news is that earlier testing and treatment can make a real difference. Identifying high blood glucose early gives you and your doctor a chance to create a plan before it causes more serious long-term complications.
Can You Have Type 2 Diabetes Without Knowing It?
Yes. Many people with type 2 diabetes do not realise they have it in the early stages.
Type 2 diabetes often develops slowly over months or years. During that time, blood glucose levels may gradually rise without causing obvious symptoms. Some people only discover they have diabetes after a routine blood test, a health check, or testing for another concern such as high blood pressure, frequent infections or high cholesterol.
Healthdirect notes that many people with type 2 diabetes have no symptoms in the early stages, which means the condition can go undiagnosed for years. (healthdirect.gov.au)
This is why screening matters, particularly if you have risk factors such as family history, high blood pressure, high cholesterol, previous gestational diabetes, PCOS, sleep apnoea, weight gain around the waist or low physical activity.
The Australian Type 2 Diabetes Risk Assessment Tool, known as AUSDRISK, is used to estimate a person’s risk of developing type 2 diabetes within the next five years. It considers factors such as age, waist measurement, family history, previous high blood glucose, physical activity, diet and blood-pressure history. (health.gov.au)
A higher risk score does not mean you definitely have diabetes. It means a blood test and GP review may be worthwhile.
Common Early Signs of Type 2 Diabetes
Type 2 diabetes can look different from person to person. Some people have several symptoms, while others have none. The symptoms below are common warning signs, but they can also happen for other reasons, which is why testing is important.
Feeling More Thirsty Than Usual
When blood glucose levels are high, the kidneys try to remove extra glucose through urine. This can cause the body to lose more fluid, making you feel thirsty more often than usual.
You may notice that you are drinking much more water than normal, waking during the night to drink, or still feeling thirsty even after having fluids.
Needing to Urinate More Often
Frequent urination is one of the better-known signs of high blood glucose. You may notice that you need to go to the toilet more often during the day, wake up at night to urinate, or pass larger amounts of urine than usual.
This may be easy to overlook if you are already drinking more water because you feel thirsty. But when thirst and frequent urination happen together, it is worth discussing with a GP.
Ongoing Tiredness or Low Energy
Feeling tired is common and does not always mean diabetes. But persistent fatigue can be one of the signs of high blood glucose.
When your body cannot use glucose properly for energy, you may feel drained, sluggish or less able to get through normal daily tasks. Poor sleep from waking to urinate, dehydration and fluctuating blood glucose can also contribute to fatigue.
Feeling Hungrier Than Usual
Some people with type 2 diabetes feel hungry more often, even when they are eating regular meals.
This can happen because glucose may be present in the blood but not being used effectively by the body’s cells for energy. The body may respond as though it still needs more fuel.
Increased hunger on its own does not confirm diabetes, but it can be more meaningful when it happens alongside thirst, frequent urination, tiredness or unexplained weight changes.
Blurred Vision
High blood glucose can affect fluid balance in the body, including the eyes. This may cause blurred or fluctuating vision for some people.
Blurred vision can also happen for many other reasons, including eye strain, dry eyes, migraines or changes in prescription glasses. But if vision changes are persistent, happen with other diabetes symptoms or come on suddenly, seek medical advice.
Healthdirect lists thirst, frequent urination, tiredness, increased hunger and blurred vision among possible symptoms of type 2 diabetes. (healthdirect.gov.au)
Symptoms People Often Mistake for Something Else
One reason type 2 diabetes can remain undiagnosed is that many early signs are easy to explain away.
For example, tiredness may be blamed on work, parenting, stress or poor sleep. Increased thirst may be blamed on hot weather, exercise or salty food. Frequent urination may be explained by drinking more water, alcohol, coffee or ageing.
These explanations may be true, but it is worth paying attention when symptoms persist, become more noticeable or occur together.
Tiredness That Does Not Improve With Rest
Many people expect fatigue to improve after a good night’s sleep or a quieter weekend. If you continue feeling tired despite resting, eating regularly and sleeping well, it may be worth checking for possible underlying causes.
Type 2 diabetes is only one possible cause of fatigue. Thyroid problems, iron deficiency, sleep apnoea, stress, depression, infections and some medicines can also contribute. A GP can help decide what tests may be appropriate.
Recurrent Thrush, UTIs or Skin Infections
High blood glucose can make some infections more likely or harder to clear. Some people notice repeated thrush, urinary tract infections, skin infections or slow-healing cuts before they realise their blood glucose is high.
Repeated infections do not always mean diabetes. But if they keep returning, especially alongside thirst, fatigue or frequent urination, it is worth discussing blood glucose testing with a doctor.
Slow-Healing Cuts or Wounds
Cuts, sores or wounds that take longer than usual to heal can be a warning sign that deserves medical attention.
High blood glucose can affect circulation, immune response and the body’s ability to repair tissue over time. This is particularly important for cuts or wounds on the feet, legs or lower limbs.
Diabetes Australia lists slow-healing wounds, frequent infections, tiredness, thirst, frequent urination, blurred vision and numbness or pain in the hands or feet among symptoms people should discuss with a GP. (diabetesaustralia.com.au)
Numbness, Tingling or Burning in the Hands or Feet
Persistent tingling, numbness, burning or unusual sensations in the hands or feet should be reviewed, especially if they are getting worse.
These symptoms can have many causes, including nerve compression, vitamin deficiencies, circulation issues or medication side effects. But over time, high blood glucose can also affect nerves.
Do not assume numbness or tingling is caused by diabetes without testing. But do not ignore it either, particularly when it happens with other possible diabetes symptoms.
Who Is More at Risk of Type 2 Diabetes?
Type 2 diabetes can affect people of different ages, body types and lifestyles. However, some factors can increase the likelihood of developing it over time.
Having one risk factor does not mean you will develop diabetes. It simply means it may be worth being more proactive about regular checks, lifestyle habits and speaking with a GP if you notice symptoms.
You may be at higher risk if you have:
- A parent, brother or sister with type 2 diabetes
- High blood pressure
- High cholesterol or high triglycerides
- Previous prediabetes or high blood glucose results
- A history of gestational diabetes during pregnancy
- Polycystic ovary syndrome, also called PCOS
- Sleep apnoea
- Weight gain around the waist or abdomen
- Low levels of physical activity
- A diet high in highly processed foods or sugary drinks
- Smoking history
- Certain medicines that can affect blood glucose
- A history of heart disease or stroke
Age can also play a role. Risk generally increases as people get older, but type 2 diabetes is not only a condition seen in older adults. It can also develop in younger adults, especially when there is a strong family history or other risk factors.
The Australian Government’s AUSDRISK tool includes age, waist measurement, family history, physical activity, diet, blood pressure and previous high blood glucose among the factors used to estimate future diabetes risk. (health.gov.au)
Family History Matters
If type 2 diabetes runs in your family, it does not mean diabetes is inevitable. But it can mean your body may be more likely to develop insulin resistance or have difficulty managing blood glucose over time.
A family history is a good reason to have regular health checks, especially if you also have high blood pressure, high cholesterol, weight gain around the waist or symptoms such as thirst and fatigue.
High Blood Pressure and Cholesterol Can Be Connected
Type 2 diabetes, high blood pressure and high cholesterol often appear together because they can be linked with similar metabolic risk factors.
For example, insulin resistance can affect blood glucose, triglycerides, weight and blood pressure at the same time. This does not mean everyone with high cholesterol has diabetes, but it does mean a GP may recommend checking blood glucose as part of a broader heart-health review.
Previous Gestational Diabetes Can Increase Future Risk
People who had gestational diabetes during pregnancy have a higher chance of developing type 2 diabetes later in life.
This is why regular follow-up testing after pregnancy matters, even if blood glucose returned to normal after giving birth. A GP can advise on the right testing schedule based on your history.
When Should You Get Tested for Diabetes?
You should consider booking a GP appointment and asking about diabetes testing if you have ongoing symptoms, multiple risk factors or a previous abnormal blood glucose result.
Testing is particularly important if you have symptoms such as:
- Ongoing thirst
- Frequent urination
- Persistent tiredness
- Blurred vision
- Recurrent thrush, UTIs or skin infections
- Slow-healing cuts or wounds
- Tingling or numbness in your hands or feet
- Unexplained weight changes
You should also consider testing if you feel well but have several risk factors, such as a family history of diabetes, high blood pressure, high cholesterol, previous gestational diabetes or a high AUSDRISK score.
A diabetes test may include an HbA1c blood test, fasting blood glucose test or oral glucose tolerance test. The most suitable test depends on your symptoms, risk factors, pregnancy status and medical history.
In Australia, HbA1c testing is commonly used to help diagnose diabetes in people at higher risk. The Medicare Benefits Schedule includes HbA1c testing for diagnosing diabetes in asymptomatic people at high risk, generally limited to once within a 12-month period under the relevant item. (www9.health.gov.au)
A blood test is the only reliable way to confirm whether you have diabetes, prediabetes or normal blood glucose levels. Do not rely on symptoms alone.
What Happens if Type 2 Diabetes Is Left Untreated?
When blood glucose remains high over a long period, it can gradually affect blood vessels, nerves and organs throughout the body.
This does not happen overnight. But untreated or poorly managed diabetes can increase the risk of complications involving:
- The heart and blood vessels
- The brain and stroke risk
- The kidneys
- The eyes and vision
- The nerves, especially in the feet and legs
- Wound healing and infection risk
High blood glucose can damage small blood vessels and nerves over time. This is why early diagnosis and regular follow-up are so important, even when symptoms feel mild.
The Australian Institute of Health and Welfare reports that diabetes is associated with a higher risk of cardiovascular disease, kidney disease, lower-limb complications and vision problems. (aihw.gov.au)
Getting diagnosed early does not mean you have failed at your health. It means you have the information needed to take action earlier and reduce the chance of complications later.
For many people, early treatment may involve practical changes to food, physical activity, weight management, sleep, stress and smoking. Some people may also need medication to help manage blood glucose safely.
What Can Help if Type 2 Diabetes Is Diagnosed Early?
If type 2 diabetes is diagnosed early, there is often a lot that can be done to improve blood glucose management and protect long-term health.
The right plan depends on your blood glucose results, health history, weight, medications, activity levels and other risk factors. Your doctor may recommend a combination of lifestyle changes, monitoring and medication where needed.
Build More Balanced Meals
A diabetes-friendly eating pattern does not need to be extreme. The focus is usually on improving food quality, portion awareness and consistency.
This may include:
- Eating more vegetables and fibre-rich foods
- Choosing wholegrains more often
- Including protein with meals
- Reducing sugary drinks
- Limiting highly processed snacks and takeaway meals
- Being mindful of portion sizes
- Spreading carbohydrate intake more evenly through the day
The goal is not to ban all carbohydrates. It is to choose higher-quality carbohydrate sources and avoid large blood glucose spikes where possible.
Move More Regularly
Physical activity helps the body use insulin more effectively and can support blood glucose, blood pressure, weight and heart health.
Walking, cycling, swimming, resistance training and even regular movement breaks during the day can be useful. You do not need to begin with intense exercise. A realistic routine that you can maintain is more valuable than an extreme plan that lasts only a few weeks.
Manage Weight Where Relevant
Weight management can help improve insulin resistance for some people, particularly when there is weight gain around the abdomen.
This should be approached without shame or unrealistic expectations. Even gradual changes can support blood glucose control and reduce pressure on the heart, joints and metabolism.
Take Medication as Prescribed
Some people with type 2 diabetes need medication from the time of diagnosis, while others may begin with lifestyle changes and monitoring.
If medication is prescribed, take it as directed and attend follow-up appointments. Do not stop diabetes medicine because you feel better or because one blood test improves. Blood glucose control needs ongoing review.
Keep Up With Regular Checks
Diabetes care is not only about blood glucose. Your GP may also monitor blood pressure, cholesterol, kidney function, eye health, foot health and cardiovascular risk.
Regular reviews can help identify changes early and keep your management plan up to date.
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