Type 2 diabetes can develop quietly.
Unlike some illnesses that cause sudden and obvious symptoms, type 2 diabetes often progresses slowly. Early changes may be mild enough to dismiss as normal aging, stress, poor sleep, or simply having an unusually busy week.
That makes knowing the possible warning signs especially important.
Type 2 diabetes occurs when the body does not make enough insulin or does not use insulin effectively, allowing glucose — commonly called blood sugar — to build up in the bloodstream. Over time, uncontrolled high blood sugar can contribute to serious health problems affecting the heart, kidneys, eyes, nerves, and other parts of the body.
The good news is that recognizing possible symptoms and getting tested can help identify diabetes earlier.
Here are 10 early warning signs of type 2 diabetes you should know.
1. You’re Urinating More Often Than Usual
Frequent trips to the bathroom can be one of the more noticeable warning signs of diabetes.
When blood glucose levels become too high, the kidneys work to remove excess glucose from the blood. That process can cause the body to produce more urine.
You might notice that you need to use the bathroom more frequently during the day or that you have started waking up during the night to urinate.
Frequent urination can have many causes and does not automatically mean you have diabetes. However, a persistent unexplained change in your normal bathroom habits is worth discussing with a healthcare professional.
2. You Feel Thirsty All the Time
Increased thirst often goes hand in hand with frequent urination.
Losing more fluid through urination can leave you dehydrated, causing you to reach for water and other drinks more frequently.
Everyone gets thirsty after exercising, spending time outdoors in hot weather, or eating salty foods. The potential warning sign is persistent or unusually intense thirst that doesn’t seem to have an obvious explanation.
If you are constantly thirsty despite drinking plenty of fluids — especially if you are also urinating frequently — consider talking with your doctor about having your blood sugar checked.
3. You’re Hungrier Than Normal
An unusual increase in appetite can also occur with diabetes.
Your body normally converts food into glucose, which cells use for energy. Insulin helps glucose move from the bloodstream into those cells.
With type 2 diabetes, the body may not use insulin properly. As a result, your cells may not receive energy as efficiently as they should even though glucose is present in your bloodstream.
That can leave some people feeling hungry even after they have recently eaten.
Persistent hunger by itself can have many explanations. But when it appears alongside symptoms such as excessive thirst, frequent urination, or fatigue, it deserves more attention.
4. You Feel Tired for No Clear Reason
Everyone has days when they feel exhausted.
But persistent fatigue that doesn’t improve with adequate sleep may be something to pay attention to.
Because diabetes interferes with the body’s ability to use glucose normally, people with elevated blood sugar may experience tiredness or reduced energy.
Fatigue is an extremely common symptom of many health conditions, so feeling tired does not mean you have diabetes.
However, ongoing unexplained fatigue — particularly when accompanied by other warning signs — is a good reason to speak with a healthcare provider.
5. Your Vision Seems Blurry
Changes in blood sugar can sometimes affect vision.
High blood glucose can cause changes in fluid levels or swelling in tissues involved in focusing your eyes, potentially resulting in temporary blurry vision.
Vision changes should never simply be assumed to be diabetes, however. Blurry vision can have numerous causes, including age-related eye changes and potentially serious eye conditions.
If you develop new or persistent changes in your eyesight, schedule an examination with an appropriate healthcare professional.
6. Cuts and Sores Seem to Take Longer to Heal
Have you noticed that a small cut, scrape, or sore seems to be hanging around longer than expected?
Slow-healing sores are another possible sign associated with diabetes.
Over time, elevated blood glucose can affect circulation and nerves, potentially making it more difficult for the body to heal certain wounds.
Pay particular attention to wounds on the feet.
People with diabetes can develop nerve problems that make it harder to notice injuries to their feet. Untreated wounds can then become more serious.
A wound that isn’t healing properly should be evaluated by a healthcare professional rather than ignored.
7. You Notice Tingling or Numbness in Your Hands or Feet
High blood sugar can eventually damage nerves, a complication known as diabetic neuropathy.
Some people experience symptoms such as numbness, tingling, burning, or unusual sensations, particularly in the hands and feet.
There are many other possible causes of numbness and tingling, ranging from vitamin deficiencies to compressed nerves. You should therefore never assume diabetes is responsible.
But recurring or unexplained numbness and tingling should be brought to your doctor’s attention.
8. You’re Losing Weight Without Trying
For many people, losing a few pounds sounds like good news.
But unexplained weight loss is different.
If you’re losing weight despite eating normally and haven’t intentionally changed your diet or activity level, it may signal an underlying health issue.
When the body cannot properly use glucose for energy, it may begin using other energy sources. This can contribute to unintended weight loss in some people with diabetes.
Unexplained weight loss can also be associated with numerous other medical conditions, making it particularly important to discuss with a healthcare provider.
9. You Keep Getting Certain Infections
Recurring infections can sometimes accompany diabetes.
The CDC lists frequent urinary tract infections and yeast infections among possible symptoms of diabetes.
Elevated blood glucose may create conditions that make certain infections more likely, while diabetes can also affect the body’s ability to fight infections.
One infection doesn’t necessarily mean anything unusual is happening.
But if infections keep returning — particularly alongside other symptoms on this list — consider asking your healthcare provider whether diabetes screening would be appropriate.
10. Several Small Symptoms Are Appearing Together
Sometimes the biggest warning isn’t one dramatic symptom.
It’s a pattern of several seemingly minor changes.
Perhaps you’re drinking more water than usual. You’re waking up twice every night to use the bathroom. Your eyesight occasionally seems blurry. You’re also more tired than you used to be.
Individually, each change might be easy to dismiss.
Together, they may provide a reason to schedule a checkup.
This is particularly important because type 2 diabetes symptoms can develop gradually over several years and may be so mild that some people don’t notice them at all.
Why Type 2 Diabetes Can Be Easy to Miss
One of the biggest misconceptions about type 2 diabetes is that everyone who develops it will immediately feel sick.
That isn’t necessarily true.
According to the National Institute of Diabetes and Digestive and Kidney Diseases, many people with type 2 diabetes have no symptoms. When symptoms do develop, they frequently appear slowly.
In fact, about 1 in 5 Americans who have diabetes don’t know they have it, according to information published by the NIDDK.
That’s why routine screening can be important even when you feel perfectly healthy.
Who Is More Likely to Develop Type 2 Diabetes?
Anyone can develop type 2 diabetes, but certain factors can increase the likelihood.
Risk generally rises with age, and the NIDDK identifies being 35 or older as one risk factor. Other factors include having overweight or obesity, having a family history of diabetes, being physically inactive, having prediabetes, or having a history of gestational diabetes.
Your individual risk depends on a combination of factors, some of which you can change and others you cannot.
Having one or more risk factors doesn’t mean you will develop diabetes. It may, however, make regular screening more important.
The Simple Blood Test That Can Provide Answers
You cannot reliably determine whether you have type 2 diabetes based on symptoms alone.
A healthcare professional can use blood tests to diagnose diabetes or prediabetes.
One commonly used option is the A1C test, which provides information about your average blood glucose level over approximately the previous three months.
According to the NIDDK, A1C results are generally interpreted as:
- Below 5.7%: Normal
- 5.7% to 6.4%: Prediabetes
- 6.5% or higher: Diabetes
A diagnosis typically requires confirmation with appropriate laboratory testing, and certain medical conditions can affect the accuracy of A1C results. Your healthcare provider can determine which test is appropriate for you.
Other tests used to diagnose diabetes include fasting plasma glucose, oral glucose tolerance, and random plasma glucose tests.
Prediabetes Is an Important Warning
A diabetes screening can reveal something else worth paying attention to: prediabetes.
Prediabetes means blood glucose levels are higher than normal but have not reached the range used to diagnose diabetes.
Finding prediabetes can provide an opportunity to take action before type 2 diabetes develops.
Lifestyle changes — including increased physical activity and weight loss when appropriate — may help some people delay or prevent the progression from prediabetes to type 2 diabetes.
When Should You Talk to Your Doctor?
Consider speaking with a healthcare professional if you notice persistent symptoms such as increased thirst, frequent urination, unexplained fatigue, blurry vision, unusual hunger, numbness or tingling, unexplained weight loss, or wounds that aren’t healing normally.
You should also ask about diabetes screening if you have risk factors even if you feel healthy.
Symptoms alone cannot diagnose diabetes.
A simple conversation with your healthcare provider and appropriate blood testing can provide far more useful information than trying to diagnose yourself based on symptoms you read about online.
The Bottom Line
Type 2 diabetes doesn’t always announce itself with an obvious warning.
For some people, the earliest clues are subtle: another trip to the bathroom, an unusually dry mouth, persistent tiredness, occasional blurry vision, or a cut that seems to be taking longer than expected to heal.
For others, there may be no noticeable symptoms at all.
Knowing the possible early warning signs can help you recognize when it’s time to speak with a healthcare professional.
And if something doesn’t seem right, don’t wait for symptoms to become severe.
Early testing may identify diabetes or prediabetes before you otherwise would have known it was there — giving you and your healthcare provider more information to protect your long-term health.
Medical disclaimer: This article is for general educational and informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. It should not replace individualized medical advice from a qualified healthcare professional.
