How Do You Know If You Have Diabetes?

2025-08-15

Diabetes can affect anyone, but the symptoms differ greatly between type 1 and type 2. Recognizing them early is important, since early diagnosis can reduce the risk of serious complications.

Two types of diabetes – different ways of showing symptoms

Diabetes is mainly divided into type 1 and type 2. Both result in high blood sugar, but they develop in completely different ways. That’s why the symptoms can also differ – and why the pace of onset varies.

Symptoms of type 1 diabetes

Type 1 diabetes often develops quickly, sometimes in just a few weeks. The symptoms are usually clear and hard to ignore. Common signs include [1]:

Frequent urination, even at night.
Intense thirst.
Unexplained weight loss despite normal or increased appetite.
Fatigue and lack of energy.
Nausea and sometimes stomach pain.

In children and young people, these symptoms are especially important to take seriously. Without treatment, type 1 diabetes can lead to diabetic ketoacidosis – a life-threatening condition that requires emergency care.

Symptoms of type 2 diabetes

Type 2 diabetes usually develops slowly and can go unnoticed for years. In fact, it is sometimes discovered only through a routine blood test. Common symptoms include [2]:

Increased thirst and more frequent urination.
Tiredness and low energy.
Blurred vision.
Slow-healing wounds.
Frequent infections, such as urinary tract infections or skin infections.

Because symptoms can be vague, many people live with type 2 for a long time without knowing it. This makes regular health check-ups especially important for those with risk factors like overweight, high blood pressure, or a family history of diabetes.

When should you see a doctor?

If you suspect diabetes – particularly if you experience the classic symptoms of thirst, tiredness, and weight loss – you should always contact a doctor for a blood sugar test. The earlier the disease is detected, the greater the chance of reducing the risk of complications such as heart disease, nerve damage, and vision problems [3].

How is diabetes diagnosed?

Diabetes is diagnosed through blood tests that measure blood sugar levels. Common tests include fasting blood sugar, HbA1c (long-term blood sugar), and sometimes an oral glucose tolerance test. These provide a clear picture of whether the body can handle sugar properly.

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