Overview
Type 2 diabetes happens when the body becomes resistant to insulin or does not make enough insulin to keep blood sugar in a healthy range. Insulin is a hormone that helps glucose move from the blood into cells for energy. Over time, high blood sugar can damage many parts of the body, including the heart, kidneys, eyes, and nerves.
Key Symptoms
Some people have no symptoms, especially early on. When symptoms do happen, they may include increased thirst, frequent urination, tiredness, blurred vision, slow-healing cuts, repeated infections, and unexplained weight changes. Tingling or numbness in the hands or feet can also occur.
Causes and Risk Factors
Type 2 diabetes develops from a combination of insulin resistance, reduced insulin production, genetics, and environmental factors. Risk can be higher with increasing age, family history, a history of diabetes during pregnancy, excess body weight, low physical activity, high blood pressure, and abnormal cholesterol levels. Some ethnic and racial groups are affected more often in many countries because of a mix of genetic, social, and environmental factors.
Who Is Affected
Type 2 diabetes can affect people of many ages and backgrounds around the world. It is more common in adults, but children and teenagers can also develop it. People with prediabetes are at higher risk of progressing to type 2 diabetes.
Prevention
Type 2 diabetes cannot always be prevented, but risk can often be reduced. Regular physical activity, nutritious eating patterns, maintaining a healthy weight, not smoking, and getting enough sleep can help. Routine health checks may identify prediabetes or early diabetes before complications develop.
Diagnosis and Tests
A healthcare professional diagnoses type 2 diabetes using blood tests that measure glucose over time or at a single point in time. Common tests include fasting blood glucose, HbA1c, and sometimes an oral glucose tolerance test. Follow-up care may also include checks of blood pressure, cholesterol, kidney function, feet, and eye health.
Treatment Categories
Treatment usually involves a combination of lifestyle changes, regular monitoring, education, and medicines when needed. Some people use oral medicines, while others may need injectable medicines, including insulin. Care also focuses on lowering the risk of complications by managing blood pressure, cholesterol, and other related health issues.
Living With It
Living with type 2 diabetes often means building daily habits around eating, movement, medications, and follow-up visits. Many people also benefit from learning how illness, stress, travel, and changes in routine can affect blood sugar. Emotional health matters too, because managing a long-term condition can feel tiring or overwhelming.
Diet and Lifestyle
Healthy eating for type 2 diabetes usually means regular meals, plenty of vegetables, whole grains, legumes, and limiting sugary drinks and highly processed foods. Physical activity can help the body use insulin more effectively. A healthcare professional or dietitian can help create a plan that fits culture, budget, daily routine, and other health needs.
When to Seek Medical Care
Seek medical care if you have symptoms of high blood sugar, if you are at risk and have not been tested, or if your diabetes management no longer seems to be working well. Also get medical advice for foot sores, vision changes, repeated infections, numbness, or side effects from treatment. Regular reviews are important even when you feel well.
When It May Be an Emergency
Urgent medical care is needed for warning signs of a diabetes emergency, such as confusion, severe weakness, vomiting, trouble breathing, severe dehydration, chest pain, fainting, or loss of consciousness. Very high or very low blood sugar can become dangerous. If severe symptoms are present, contact local emergency services right away.
Questions to Ask a Healthcare Professional
You may want to ask what tests you need, what your results mean, and how often you should have follow-up visits. Other useful questions include how to monitor your condition, what warning signs to watch for, and how to lower your risk of eye, kidney, nerve, and heart problems. Ask for clear guidance that fits your daily life, food preferences, and access to care.