Yes, you can absolutely have diabetes, especially type 2, and not know it for years because symptoms are often subtle, develop slowly, or are mistaken for normal aging, fatigue, or lifestyle issues, leading to significant silent damage before diagnosis. Many people have no symptoms in the early stages, with some only finding out after serious complications like a heart attack or stroke occur.
Diabetes often starts with mild symptoms such as feeling very hungry and tired, needing to pee a lot, being very thirsty, having a dry mouth, itchy skin, and blurry vision. Type 1 diabetes symptoms appear quickly and are more severe, while type 2 symptoms develop slowly.
Symptoms of type 2 diabetes often come on slowly. In fact, people can live with type 2 diabetes for years and not know it.
Five common signs of prediabetes include increased thirst/urination, constant fatigue, blurry vision, dark skin patches (acanthosis nigricans), and slow-healing cuts or frequent infections, though prediabetes often has no noticeable symptoms, making early detection key. These signs often signal higher blood sugar levels, indicating your body isn't using insulin effectively.
Yes, diabetes can cause easier bruising and slow-healing bruises due to high blood sugar damaging blood vessels, affecting skin elasticity (thinning it), and impacting nerve function, which reduces sensation to minor injuries. Poor circulation from diabetes also means bruises take longer to heal because less oxygen and fewer nutrients reach the skin, impairing repair. Bruising can also occur from needles used for glucose monitoring or insulin injections, which can be more noticeable in diabetics.
Common symptoms of diabetes:
For the few people who do experience symptoms of prediabetes, they may include: Darkened skin in your armpit or back and sides of your neck (acanthosis nigricans). Skin tags. Eye changes that can lead to diabetes-related retinopathy.
Fasting blood glucose test
This is a blood test that measures blood sugar levels after fasting. If your fasting blood sugar level is between 100 mg/dL and 125 mg/dL, it's an indication that you're prediabetic.
Symptoms of hyperglycaemia
It's estimated that one in two people. View Source with type 2 diabetes have sleep problems due to unstable blood sugar levels and accompanying diabetes-related symptoms, High blood sugar (hyperglycemia) and low blood sugar (hypoglycemia) during the night can lead to insomnia and next-day fatigue.
But untreated diabetes affects many major organs, including your heart, blood vessels, nerves, eyes and kidneys. Being diagnosed early and managing your blood sugar levels can help prevent these complications.
Many people with diabetes have peripheral artery disease (PAD), which reduces blood flow to the feet. Also, many people with diabetes have neuropathy, causing you to not feel your feet. Together, these problems make it easy to get ulcers and infections that may lead to amputation.
Over time, high blood glucose levels can damage the body's organs. Possible long-term effects include damage to large (macrovascular) and small (microvascular) blood vessels, which can lead to heart attack, stroke, and problems with the kidneys, eyes, gums, feet and nerves.
Three common signs of diabetes are increased thirst and frequent urination, extreme tiredness, and blurry vision or slow-healing sores, often stemming from high blood sugar levels affecting the body. These symptoms, sometimes called the "Three Ps" (polyuria, polydipsia, polyphagia), can develop slowly in Type 2 diabetes or quickly in Type 1.
Both type 1 and type 2 diabetes can have similar symptoms, including: Frequent urination (peeing). Increased thirst and hunger. Losing weight without trying.
The worst foods for diabetics include:
Ten key warning signs of diabetes include increased thirst and urination, extreme hunger, fatigue, blurred vision, slow-healing sores, unexplained weight loss, tingling/numbness in hands or feet, frequent infections, and sometimes dark skin patches (acanthosis nigricans), all indicating high blood sugar levels needing medical attention.
Common Signs of Uncontrolled Diabetes
Extreme fatigue: When your body can't properly use glucose for energy, you may feel tired all the time. Blurred vision: High blood sugar can cause the lens of your eye to swell, leading to temporary vision changes.
Fasting blood sugar test.
A fasting blood sugar level less than 100 mg/dL (5.6 mmol/L) is normal. A fasting blood sugar level from 100 to 125 mg/dL (5.6 to 6.9 mmol/L) is considered prediabetes. If it's 126 mg/dL (7 mmol/L) or higher on two separate tests, you have diabetes.
Classic signs and symptoms that suggest you've moved from prediabetes to type 2 diabetes include:
Treatment
Physical symptoms: reduced activity, low energy, tiredness, decreased physical endurance, increased effort to do physical tasks, general weakness, heaviness, slowness or sluggishness, nonrestorative sleep, and sleepiness.
“The best way to reverse type 2 diabetes is to decrease your body's resistance to the actions of the insulin made by the pancreas,” she said. “For most people, this means trying to attain a healthy weight, exercising regularly, and minimizing sugars and excessive carbohydrates in your diet.”
Acanthosis nigricans (AN)
This skin condition causes dark patches of velvety skin in body creases such as your neck, armpits, or groin. Sometimes patches appear on your hands, elbows, or knees. Diabetes can cause skin infections or changes such as dark patches on the skin.
One of the early warning signs of prediabetes is increased thirst and frequent urination. These symptoms are directly related to the body's inability to regulate blood sugar levels effectively.