儿童发育里程碑：每个年龄段的预期发展

Overview

Type 2 diabetes is a long-term condition in which your body becomes resistant to insulin (the hormone that helps move sugar from blood into cells) or does not make enough insulin. This causes blood sugar (glucose) levels to rise. It is the most common form of diabetes and often develops in adults, though it can occur at younger ages. Good management keeps blood sugar in a target range, protects your heart, kidneys, eyes, and nerves, and helps you feel your best.

Signs & Symptoms

Many people have no clear symptoms early on, which is why screening is important if you have risk factors. When symptoms appear they may include:

• Increased thirst and frequent urination
• Increased hunger
• Unexplained weight loss or gain
• Fatigue or low energy
• Blurred vision
• Slow-healing sores or frequent infections
• Tingling or numbness in hands or feet
• Darkened skin patches (acanthosis nigricans), often on the neck or armpits

Causes & Risk Factors

Type 2 diabetes develops from a mix of genetics and lifestyle. Insulin resistance builds over time, often linked to excess body weight, especially around the abdomen. Key risk factors include:

• Being overweight or obese
• Physical inactivity
• Age 45 or older (though younger people are increasingly affected)
• Family history of type 2 diabetes
• History of gestational diabetes or prediabetes
• High blood pressure or abnormal cholesterol
• Certain ethnic backgrounds (higher risk in some groups)
• Polycystic ovary syndrome (PCOS)

Diagnosis

Diagnosis is based on blood tests. Common tests include fasting plasma glucose, A1C (average blood sugar over about 3 months), or an oral glucose tolerance test. Your clinician will also check for related conditions such as high blood pressure and cholesterol. Early diagnosis allows prompt lifestyle changes and treatment to prevent or delay complications.

Treatment & Management

There is no cure, but type 2 diabetes is highly manageable. Treatment is personalized and usually starts with lifestyle changes. Many people also need medicines. Goals include keeping A1C, blood pressure, and cholesterol at targets set with your care team, plus protecting heart and kidney health.

• Lifestyle first: balanced eating (focus on vegetables, whole grains, lean proteins, healthy fats; limit added sugars and refined carbs), regular physical activity (aim for at least 150 minutes of moderate activity per week plus strength training), and weight management if needed
• Medications: metformin is often first-line; other options include SGLT2 inhibitors, GLP-1 receptor agonists, DPP-4 inhibitors, sulfonylureas, or insulin if needed. Newer medicines may also help with weight and heart/kidney protection
• Blood sugar monitoring: home glucose checks or continuous glucose monitors (CGMs) as recommended
• Regular medical care: A1C checks, eye exams, foot exams, kidney tests, and vaccinations
• Addressing other risks: blood pressure and cholesterol medicines, smoking cessation, and sleep apnea treatment if present

Living With It

Living well with type 2 diabetes means building sustainable daily habits and working as a partner with your healthcare team. Track your numbers, plan meals, stay active in ways you enjoy, care for your feet daily, manage stress, and get enough sleep. Many people find support groups, diabetes education classes (often covered by insurance), and digital tools helpful. Focus on progress, not perfection—small consistent steps add up. With good management, people with type 2 diabetes can enjoy long, healthy lives and reduce the chance of serious complications such as heart disease, kidney disease, vision loss, and nerve damage.