If you have diabetes, you know there are many symptoms and signs that your body is not healthy. While there may be no cure for diabetes, there are ways to treat it. Here’s a list of four signs and symptoms you should look out for, in case you are suffering from diabetes.

Diabetes occurs when the body does not produce enough or has insufficient control over the hormone insulin. It occurs when your body does not produce enough insulin, or when the body does not produce sufficient insulin to regulate the amount of glucose (sugar) in your blood. The body’s cells need glucose to function and to make energy. Without adequate insulin, glucose levels in your blood are too high. The first symptom of diabetes is blood glucose levels that are too high.

By , medical review by – Updated July 2, 2021

Over the past 40 years the number of people with diabetes worldwide has quadrupled and currently stands at more than 400 million, according to the World Health Organization (WHO). What’s more, many are unaware they have diabetes or its precursor, prediabetes.

Could you have diabetes? It’s a disease with many early symptoms; although some are subtle, others are hard to ignore. Read on to learn about the most common symptoms of diabetes and what you can do if you have them.

1. What is diabetes?

Diabetes is a medical condition that causes high blood sugar either due to a lack of insulin (a hormone that controls blood sugar) or an inability to use it effectively. Although it can take several forms, type 1 and type 2 are by far the most common.

  • In type 1 diabetes, the body’s immune system mistakenly destroys cells in the pancreas that make insulin. Because of this, people with type 1 diabetes can no longer make insulin on their own and must inject it every day — not only to control blood sugar but also to survive.
  • In type 2 diabetes, the pancreas still makes insulin — usually in even greater amounts than normal — but the body’s cells are resistant to its effects. Because the pancreas still makes insulin, type 2 diabetes is sometimes called non-insulin-dependent diabetes. However, over time, the pancreas may be unable to make enough insulin to control blood sugar and insulin injections may be required.

A related and very important condition is prediabetes, in which blood sugar is higher than normal but not high enough to be classified as diabetes. Additionally, insulin levels are usually elevated both before and after eating.

Over time, prediabetes may progress to type 2 diabetes; however, it carries some of the same health risks of diabetes even if blood sugar remains in the prediabetes range.

Also, although people with prediabetes usually don’t have symptoms that reflect very high blood sugar, they may have some of the more subtle ones.

2. Symptoms of diabetes

Here are the most common diabetes symptoms:

  1. Thirst and urination
  2. Fatigue
  3. Hunger
  4. Weight loss
  5. Delayed healing
  6. Blurred vision
  7. Numbness
  8. Dark patches
  9. Skin rashes
  10. Yeast and urinary tract infections
  11. Erectile dysfunction

You may have one, two, or several symptoms — or you may have none. An absence of symptoms doesn’t mean an absence of diabetes.

However, being aware of common symptoms may lead to diagnosis much earlier, which may help prevent long-term complications.

Increased thirst and urination

Have you been feeling very thirsty or running to the bathroom more often lately? Frequent urination coupled with a near-constant sensation of thirst are well-known signs of diabetes.

When blood sugar is too high, water is pulled from your bloodstream and organs to help your kidneys flush out the excess glucose.

The sugary urine smells sweet – and even tastes sweet. In fact, although it’s rather unsettling to think about, tasting patients’ urine helped doctors identify diabetes before blood tests and glucose meters were available.

Because so much water is leaving your body, the brain triggers your thirst mechanism, prompting you to drink enough to replace what’s being lost.

Excessive thirst and urination is more common in type 1 diabetes when blood sugar levels are very high but may also occur in type 2 diabetes. In a study of over 1,100 people recently diagnosed with type 2 diabetes, more than half reported increased urination, and nearly two-thirds reported being abnormally thirsty.

Severe fatigue

Although there are many conditions that can make you feel tired, diabetes is a very common one. In undiagnosed diabetes, fatigue is tough to ignore; you may feel so tired that you can barely keep going during the day, despite getting plenty of sleep.

Why does diabetes make you feel so tired? One theory is because glucose — one of your body’s major fuel sources — is accumulating in your bloodstream rather than getting into your cells.

Insulin allows glucose to enter your cells. When your pancreas doesn’t produce insulin or your cells are resistant to its effects, glucose remains in the blood. As a result, you may feel tired and weak because your cells are deprived of the fuel they need.

In studies, many people with newly diagnosed diabetes report fatigue as one of their main symptoms.

Feeling hungrier than usual

It’s normal for your appetite to vary from day to day based on activity, sleep, mood, and dozens of other factors. However, if you’ve recently been much hungrier than usual, diabetes could be the reason.

Along with frequent urination (polyuria) and thirst (polydipsia), severe hunger (polyphagia) is one of the “Three P’s” considered to be classic symptoms of diabetes.

Increased hunger is related to another diabetes symptom, fatigue. Your body breaks down carbohydrates into sugar (glucose) that your cells use for energy.

But, as one theory goes, if glucose can’t get into your cells due to a lack of insulin or insulin resistance, your body may feel as though it’s starving. Therefore, you become hungrier and more tired than ever — even if you’re eating as much or more than usual.

Unfortunately, eating more food usually doesn’t satisfy this hunger. What’s more, reaching for carbohydrate-rich foods (including fruit, legumes, and whole grains) can cause blood sugar to increase even more.

This is because starchy carbohydrates like cereals, potatoes or bread are made up of lots of glucose molecules joined together. The process of digestion breaks these starches back down into glucose, which raises blood sugar once it’s absorbed into the bloodstream.

Although it can also happen in type 2 diabetes, feeling noticeably more hungry is especially common in type 1 diabetes.

Unexplained weight loss

Losing weight is usually a welcome and expected result of making dietary changes. However, if it happens when you haven’t changed what or how much you eat, something is amiss.

Everyone experiences small weight fluctuations from day to day, but if you’ve lost 10 pounds (4.5 kilos) or more without trying, diabetes may be the cause.

In addition to allowing glucose to enter your cells and preventing your liver from releasing glucose, insulin helps prevent muscle and fat breakdown.

If you have type 1 diabetes, your pancreas makes little to no insulin. Therefore, your body begins to break down fat and muscle, leading to weight loss.

Although unexplained weight loss is much more common in people with type 1 diabetes — including children and lean adults who can’t afford to lose weight — it can also happen in those with type 2 diabetes.

In one study, slightly more than one-third of people newly diagnosed with type 2 diabetes reported that they had recently lost weight without trying to. Furthermore, one study found that some populations with type 2 diabetes may experience unintentional weight loss more often than others.

Delayed healing of injuries

Have you noticed that cuts, scrapes, or other injuries have been taking longer to heal than usual? This may be a warning sign of diabetes. Elevated blood sugar has been shown to interfere with proper wound healing following surgery or injury.

Why would having high blood sugar prolong the time it takes your skin to heal? Research suggests that elevated blood sugar drives inflammation and impairs the immune system’s ability to repair wounds effectively. In addition, decreased blood flow from peripheral artery disease can further impair wound healing. So if blood sugar levels are high, minor injuries might take weeks or months to heal rather than days.

Blurred vision

Sometimes blurry vision isn’t a sign that you need a new prescription for eyeglasses. It could actually be a symptom of diabetes.

Elevated blood sugar causes the lens of the eye to swell, which can change its shape. When this occurs, the lens can no longer focus light properly, causing distance vision to become blurry.

Once blood sugar levels return to a healthy level, the lens goes back to its usual shape, and vision becomes normal again.

In one study, about one quarter of people with newly diagnosed diabetes reported that their vision had become blurry.

Numbness and tingling in feet or toes

It’s normal to have that familiar yet uncomfortable “pins and needles” sensation after sitting too long or putting pressure on one part of the body. However, if it occurs in your feet or toes for no apparent reason, diabetes or prediabetes could be responsible.

Elevated blood sugar can damage the nerves leading to your feet, resulting in numbness and tingling. The medical term for this condition is diabetic peripheral neuropathy.

Importantly, blood sugar may not need to be very high for this damage to occur.

In one study, 49% of people with prediabetes and 50% of those with newly diagnosed diabetes were found to have peripheral neuropathy.

Dark patches of skin

Have dark, velvety patches of skin developed over certain parts of your body, especially the creases of your armpits, groin or neck? Do they appear grayish, brown or black?

The medical term for these patches is acanthosis nigricans. It may be caused by several conditions but is often linked to elevated insulin levels and insulin resistance. It has also been linked to type 2 diabetes, especially in those who are overweight or obese.

In one study of people newly diagnosed with type 2 diabetes, 54% of those who were obese had acanthosis nigricans.

Skin lesions or rashes

Rashes, lesions, and other skin problems may be an early warning sign of diabetes.

Several skin conditions — including eruptive xanthomatosis, necrobiosis lipoidica, and diabetic dermopathy — are characterized by itchy rashes or painful blisters that appear when blood sugar is too high.

Although the precise mechanism behind these and other skin disorders in people with diabetes isn’t clear, elevated blood sugar may lead to inflammation and interfere with the ability to grow healthy new skin cells to replace old ones.

One large review of existing studies found that over 50% of people with diabetes worldwide had some type of diabetes-related skin disorder.

Yeast and urinary tract infections (women)

Have you been experiencing yeast infections or urinary tract infections (UTIs) more often lately? Frequent infections may be an early warning sign of diabetes, with yeast infections and UTIs among the most common.

High blood sugar can fuel the growth of both Candida (the fungus responsible for vaginal yeast infections) and several types of bacteria that can cause UTIs. In addition, high blood sugar levels may depress immune function, making your body more susceptible to these infections.

Erectile dysfunction (men)

In men, one of the first signs of diabetes may be difficulty with sexual function. High blood sugar can affect the nerves and blood vessels that lead to reproductive organs, resulting in erectile dysfunction.

Studies suggest that men who have diabetes may be three to five times more likely than other men to have erectile dysfunction.

3. How to find out if you have diabetes

If you have one or more of the symptoms above and suspect you may have diabetes, it’s important to make an appointment with your doctor or primary care provider. They will examine you and order lab tests to confirm whether you have type 1 diabetes, type 2 diabetes or prediabetes, and to rule out other causes of your symptoms.

You can also test your blood sugar at home to see if it is elevated. Regardless of the results, be sure to follow up with your healthcare provider if you have any symptoms of diabetes.

Importantly, in many cases, you may have no obvious symptoms of prediabetes or early-stage type 2 diabetes.

4. What can you do if you have diabetes or prediabetes?

If you’ve been diagnosed with diabetes or prediabetes, you’re likely to be upset and concerned.

Although this is completely understandable, take heart. In addition to following up with your doctor on a regular basis, there are steps you can take right now to get your blood sugar under control — and make sure it stays there.

In fact, in many cases, type 2 diabetes and prediabetes can be reversed or put into remission with a low-carb diet alone. Check out our guide below.

And although type 1 diabetes can’t be reversed, low-carb eating can help control blood sugar. See our guide below.

Finally, please don’t ignore the symptoms of diabetes, no matter how subtle they seem. It’s never too early to see your doctor and get checked out — or to start following a low-carb diet to achieve healthy blood sugar levels.

Furthermore, even if your blood sugar is normal now, limiting sugary and starchy foods may help to keep it that way. This doesn’t mean going on a diet, just eating better. Take a look at our guide below on six steps you can take to eat fewer carbs.

Frequently Asked Questions

What are the first signs of being a diabetic?

The first signs of diabetes are weight loss, increased thirst, frequent urination, and unexplained fatigue.

What are the 3 most common symptoms of undiagnosed diabetes?

The 3 most common symptoms of undiagnosed diabetes are: -Fatigue -Blurred vision -Sudden weight loss

What are 10 warning signs of diabetes?

1. Frequent urination 2. Increased thirst 3. Fatigue 4. Weight loss without trying 5. Blurred vision 6. Numbness or tingling in the hands and feet 7. Sores that don’t heal 8. Itching, burning, or pain when you pee or have a bowel movement 9. Slowed healing of cuts and scrapes 10. Unusual weight gain

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