Type 2 diabetes and pre-diabetes often have no noticeable symptoms in their early stages, which is why they can go undiagnosed for a long time, leading to potential complications before detection. While Type 1 diabetes symptoms appear suddenly, Type 2 develops gradually, with many people experiencing no signs or mistaking them for aging, making regular screening important for those at risk, according to Healthdirect and Diabetes Australia.
People with type 2 diabetes can have no symptoms for a long time. The signs often appear slowly over a few years, so some people don't realise they have it. It's often found during a check-up.
Type 1 diabetes is an autoimmune condition where the body attacks insulin-producing cells, leading to a sudden onset and need for lifelong insulin; Type 2 diabetes is a metabolic issue where the body becomes insulin resistant or doesn't produce enough, often developing gradually due to lifestyle, but both involve high blood sugar and similar symptoms like thirst, frequent urination, and fatigue, requiring management. The main difference lies in cause (autoimmune vs. metabolic/lifestyle) and typical onset (sudden/childhood vs. gradual/adulthood), though both can appear at any age.
Warning Signs and Symptoms
Symptoms
Treatment
Symptoms of hyperglycaemia
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.
Many conditions that mimic diabetes, such as PCOS, hypothyroidism, and Cushing's syndrome, share insulin resistance as a defining feature. The most common cause of insulin resistance is obesity.
Symptoms of type 2 diabetes often come on slowly. In fact, people can live with type 2 diabetes for years and not know it.
Life expectancy of people who have type 2 diabetes may be reduced by about 10 years while people with type 1 diabetes have worse prognosis of a reduced life expectancy by over 20 years.
Insulin is a medicine that helps your body use glucose (sugar) for energy. You'll need to be prescribed insulin for type 2 diabetes if other diabetes medicines no longer work well enough to keep your blood glucose within a healthy range. Sometimes you may only need to take insulin for a short time.
Prediabetes or Borderline diabetes is a condition in which you have higher than normal blood sugars, but not to a level high enough to be Diabetic. It is a condition that needs monitoring and lifestyle changes.
While it's possible to reverse prediabetes, it's typically not possible to reverse diabetes complications. This is why prevention and/or proper management are key.
Some of the symptoms of type 1 diabetes and type 2 diabetes are:
Significant and sustained weight loss—for example, in the range of 10 kg (about 22 pounds) as shown in some studies—is the most important factor. Studies in which participants lost small amounts of weight have shown lower rates of type 2 diabetes remission.
MODY (Maturity-Onset Diabetes of the Young) is a rare genetic form of diabetes that usually develops before age 25 as a result of gene mutations. Neonatal diabetes occurs within the first six months of life.
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.
Red flag signs of diabetes symptoms
Feeling extremely hungry or thirsty. Feelings similar to drunkenness. Unusual behaviors, which may also indicate low blood sugar. Infections, bloody or swollen gums, or foot sores.
The 4 Ps of diabetes – polyuria, polydipsia, polyphagia, and sometimes a fourth P – are key signs of high blood sugar. These symptoms have been known for centuries as signs of diabetes mellitus. Learning about the history of these symptoms helps us understand their importance.
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.
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.
A normal HbA1c for most adults without diabetes is below 5.7%, but levels can naturally rise slightly with age, with upper limits potentially reaching around 6.0-6.5% in older adults (60+) for non-diabetic ranges, while diabetes is diagnosed at 6.5% or above; target ranges for people with diabetes are personalized, often below 7%, but adjusted higher (up to 8.5% or 9%) for the elderly to avoid hypoglycemia.
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