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Symptoms of Diabetes: Early Signs in Men and Women

Early and main symptoms of diabetes in adults: thirst, frequent urination, fatigue, weight loss. When to check blood sugar and how the diagnosis is made.

Hand holding a blood glucose meter showing 128 with a test strip inserted, checking blood sugar for diabetes symptoms
Published: November 1, 2026 · Updated: November 1, 2026 · 4 min read

Diabetes mellitus is a disease in which the level of glucose (sugar) in the blood becomes too high. Symptoms appear because glucose does not reach the cells and remains in the blood. Below are the early and main signs that adults report, and guidance on when to check blood sugar.

What diabetes is and why it causes symptoms

Glucose is the main source of energy: the body produces some of it itself and gets some from food. Insulin is a hormone of the pancreas that carries glucose from the blood into the cells. In diabetes, the body does not produce insulin, does not use it well enough, or both: glucose remains in the blood, its level rises, and the cells do not receive energy.

In type 1 diabetes there is little or no insulin — the immune system destroys the cells that produce it; it is often detected in childhood, but it can begin at any age. Type 2 diabetes is the most common: insulin is present, but the cells respond poorly to it.

Key point: the symptoms are explained by high blood glucose levels, so they manifest in different systems.

First and early signs of diabetes

The most common early symptoms are constant thirst, urination more often than usual, marked fatigue, and effortless weight loss. In type 1 diabetes they appear quickly and can be severe. In type 2 diabetes symptoms develop slowly, over several years, often so mildly that the person does not notice them. Some people with diabetes feel no changes at all.

Key point: the absence of complaints does not rule out diabetes — in the second form, symptoms remain unnoticed for years.

All main symptoms of diabetes

There are more signs than the four most common ones.

  • constant thirst;
  • urination more often than usual, including at night;
  • marked fatigue;
  • effortless weight loss;
  • constant hunger.

To this are added blurred vision, numbness or tingling in the feet and hands, and wounds and abrasions that take a long time to heal.

Key point: the more signs that match, the more reason there is to check blood sugar.

External signs of diabetes

Among the signs are effortless weight loss, thirst, and fatigue. There can also be wounds that do not heal and periodically blurred vision.

High glucose levels over time damage nerves, so foot problems appear, and the eyes need separate monitoring: adults and children from age 12 have eye screening every 1–2 years. Diabetes increases the likelihood of gum disease, kidney problems, heart attack, and stroke.

Key point: external signs are visible to others, but the diagnosis is made by blood tests.

Symptoms of diabetes in men and in women: is there a difference

There is no separate list of "male" or "female" symptoms: thirst, frequent urination, fatigue, weight loss, and the other signs are described the same way for adults of both sexes. The difference lies in the risks and in when testing is ordered.

In women, gestational diabetes is distinguished: it develops during pregnancy, often without symptoms, and pregnant women are usually tested at 24 to 28 weeks. The risk is higher if there was gestational diabetes before, if the child was born weighing about 4 kg or more, with a family history of diabetes, excess weight, and polycystic ovary syndrome. After childbirth it usually resolves, but the risk of type 2 diabetes remains elevated.

In men, no separate symptoms have been described — the signs are the same.

Key point: sex changes not the list of symptoms but the risks — pregnancy and polycystic ovary syndrome in women, weight and age in both.

When to see a doctor and how diabetes is diagnosed

People see a doctor as soon as at least one of the symptoms appears. A separate reason for testing is risk factors: excess weight, age over 35, family history of diabetes, prediabetes, high blood pressure, polycystic ovary syndrome, prior gestational diabetes. Diabetes can occur without symptoms, so testing is discussed even without complaints.

The diagnosis is confirmed by blood glucose tests — there are several types, including the glycated hemoglobin (A1C) test. The doctor compares the results with reference ranges and assesses risk factors.

Diabetes symptoms on their own are not a reason to call an ambulance. 103 or 112 are needed if the condition is life-threatening — for example, with signs of heart attack or stroke, which are considered complications of diabetes.

Key point: diabetes is confirmed by a blood test, not by a set of sensations. This material is for reference: it helps you learn the symptoms and prepare for a conversation with a doctor, but does not replace a consultation.

Sources

  1. NHS: Diabetes
  2. MedlinePlus: Diabetes
  3. When to call 999 — NHS
  4. When to visit A&E — NHS

Update history

First publication.
Tags DiabetesBlood GlucoseHyperglycemia

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This content is for reference and does not replace a doctor's consultation. Medical disclaimer