Type 2 Diabetes: Early Signs, Diagnosis and Day-to-Day Management
Type 2 diabetes is a long-term condition in which the body either does not make enough insulin or cannot use it effectively, so sugar builds up in the blood instead of fuelling the cells. It develops slowly, often over years, and many people have it for a long time before it is found. Early detection and steady management prevent most of its serious complications.
How the condition develops
After a meal, carbohydrate is broken down into glucose. The pancreas releases insulin, which moves glucose into muscle, liver and fat cells. In type 2 diabetes, those cells become resistant to insulin, and over time the pancreas struggles to keep up. Excess weight around the abdomen, inactivity, genetics, age and certain ethnic backgrounds all raise the risk. Gestational diabetes, polycystic ovary syndrome and a family history also increase it.
Early signs to watch for
Symptoms are often mild or absent. When they appear, they include:
- Increased thirst and a dry mouth
- Passing urine more often, particularly at night
- Unusual tiredness
- Blurred vision
- Slow-healing cuts or frequent infections, such as thrush or urinary infections
- Tingling or numbness in the hands or feet
- Dark, velvety patches of skin on the neck or armpits (acanthosis nigricans)
- Unexplained weight loss, which is more typical when sugar is very high
Because symptoms are so easy to ignore, screening matters. Adults over 35, or younger people with obesity or other risk factors, should have blood sugar checked.
How it is diagnosed
Doctors use blood tests:
- HbA1c, which reflects average blood sugar over about three months. A level of 48 mmol/mol (6.5 per cent) or above indicates diabetes; 42 to 47 mmol/mol (6.0 to 6.4 per cent) suggests prediabetes.
- Fasting plasma glucose of 7.0 mmol/L (126 mg/dL) or above.
- Oral glucose tolerance test, with a two-hour value of 11.1 mmol/L (200 mg/dL) or above.
A diagnosis is normally confirmed with a second abnormal result unless there are clear symptoms.
Why control matters
Long-standing high blood sugar damages small and large blood vessels and nerves. The main complications are:
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- Heart attack and stroke
- Kidney disease, which can progress to dialysis
- Retinopathy, a leading cause of preventable blindness
- Neuropathy, with pain or numbness in the feet
- Foot ulcers and, in severe cases, amputation
- Higher risk of infections and gum disease
Good control of blood sugar, blood pressure and cholesterol together dramatically reduces all of them.
Eating well with diabetes
There is no single diabetes diet. What helps most is consistency and quality.
- Choose high-fibre, slowly digested carbohydrates such as whole grains, legumes, vegetables and whole fruit.
- Limit sugary drinks, sweets, white bread and large portions of refined rice or pasta.
- Include protein and healthy fats such as fish, eggs, nuts and olive oil.
- Do not skip meals if you take medication that can cause low sugar.
- Watch portion sizes; a plate with half non-starchy vegetables is a simple guide.
Some people achieve remission through major weight loss. Studies show that losing around 10 to 15 kg early after diagnosis, often with a structured low-calorie programme, can return blood sugar to non-diabetic levels in a large share of people.
Activity
Exercise improves insulin sensitivity for hours afterwards. Aim for at least 150 minutes of moderate activity weekly, plus resistance exercise twice a week. A ten-minute walk after meals blunts the post-meal sugar rise.
Medicines
Metformin is usually the first drug. Others include SGLT2 inhibitors, which also protect the heart and kidneys; GLP-1 receptor agonists, which aid weight loss and cardiovascular protection; DPP-4 inhibitors; sulfonylureas; and insulin when needed. Treatment is tailored to your heart, kidney and weight profile. Needing insulin is not a personal failure; it reflects the natural history of the condition.
Self-monitoring and check-ups
Some people check finger-prick or sensor glucose; others rely on HbA1c every three to six months. Every year you should have a foot examination, an eye screening, kidney tests (urine albumin and eGFR), blood pressure and cholesterol checks. Daily foot checks at home, looking for blisters, cuts or redness, catch problems early.
When to get help urgently
Seek urgent care for vomiting with abdominal pain and fast breathing, extreme thirst with drowsiness or confusion, or a blood sugar that stays very high. On treatments that can cause hypoglycaemia, shakiness, sweating and confusion need quick sugar and medical advice.
Outlook
Type 2 diabetes is manageable. With early diagnosis, sensible changes to food and activity and the right medicines, most people live long, healthy lives.
This article is for general information and is not a substitute for professional medical advice. If you are worried about your health or have symptoms, speak to a doctor or other qualified health professional.