Type 2 Diabetes: Symptoms, Causes & Treatment

Type 2 Diabetes is a chronic metabolic disorder characterized by elevated blood glucose levels over prolonged periods. It occurs when body cells lose the ability to respond normally to insulin (insulin resistance), or when the pancreas fails to produce sufficient insulin to maintain normal blood sugar levels. This differs from Type 1 Diabetes, where the immune system directly attacks insulin-producing pancreatic cells.

Type 2 Diabetes is widespread globally, affecting millions of people. In Jordan, more than 15% of adults suffer from this condition, making it one of the most prevalent chronic diseases in the Kingdom. The incidence increases with age, obesity, and unhealthy dietary habits. Although it is a chronic condition requiring lifelong management, it can be effectively controlled through a combination of lifestyle modifications and modern medications.

Early diagnosis and effective treatment are crucial in preventing serious complications such as heart disease, stroke, blindness, and kidney failure. Thanks to recent therapeutic advances, patients can maintain healthy blood sugar levels and enjoy a good quality of life.

Symptoms of Type 2 Diabetes develop gradually and may not be noticeable in early stages. Some individuals discover the disease incidentally during routine check-ups. When symptoms appear, they may vary depending on blood sugar levels and disease duration. Attention should be paid to the following symptoms:

• Excessive thirst and increased fluid intake without relief.
• Frequent urination, especially at night (nocturia).
• Unexplained fatigue and exhaustion despite adequate rest.
• Unintentional weight loss without dietary or exercise changes.
• Persistent hunger despite regular eating.
• Blurred vision or visual clarity issues.
• Slow wound healing and frequent bruising.
• Recurrent skin infections or unexplained itching.
• Tingling or numbness in hands and feet (neuropathy).
• Sexual dysfunction or erectile dysfunction in men.
• Acid reflux or gastrointestinal discomfort.
• Recurrent urinary tract infections, especially in women.

• Insulin Resistance: The primary condition where muscle, fat, and liver cells fail to respond normally to insulin signals, forcing the pancreas to produce increasing amounts to compensate.
• Pancreatic Beta Cell Dysfunction: Over time, beta cells in the pancreas lose their ability to produce sufficient insulin to meet the body's demands.
• Obesity and Fat Accumulation: Obesity, especially visceral fat around the abdomen, increases insulin resistance and disrupts hormonal functions.
• Unhealthy Dietary Habits: Excessive consumption of added sugars, saturated fats, and processed foods increases the risk of developing the disease.
• Sedentary Lifestyle: Lack of physical activity weakens glucose metabolism and promotes weight gain.
• Genetic Factors: A family history of diabetes significantly increases the likelihood of developing the disease.
• Chronic Stress: Stress elevates hormones like cortisol and adrenaline, negatively affecting blood sugar regulation.
• Sleep Disorders: Insufficient sleep or chronic insomnia impairs glucose metabolism and appetite regulation.

• Age: Risk increases after age 45, especially in older populations.
• Obesity: A BMI above 25 is considered a major risk factor.
• Family History: Having a parent or sibling with diabetes significantly increases risk.
• High Blood Pressure: A reading of 140/90 mmHg or higher is associated with increased risk.
• Abnormal Cholesterol Levels: High triglycerides or low HDL cholesterol increase risk.
• Gestational Diabetes History: Women who had gestational diabetes have higher risk later in life.
• Polycystic Ovary Syndrome (PCOS): Associated with increased insulin resistance risk.
• Gender and Ethnicity: Men and certain ethnic groups (Arab and Asian populations) have higher risk.
• Physical Inactivity: Lack of regular exercise increases risk substantially.
• Harmful Habits: Smoking and alcohol use increase the likelihood of developing diabetes.

Early diagnosis of Type 2 Diabetes is crucial for preventing complications. Diagnosis is based on a combination of laboratory and clinical examinations. The physician may order several tests to confirm diagnosis and assess disease severity:

• Fasting Blood Glucose (FBG): Blood is drawn after 8 hours of fasting. Normal value is less than 100 mg/dL. A value of 126 mg/dL or higher on two separate days indicates diabetes.
• Oral Glucose Tolerance Test (OGTT): Patient drinks a glucose solution and blood sugar is measured after 2 hours. A value of 200 mg/dL or higher indicates diabetes.
• Hemoglobin A1c Test (HbA1c): Reflects average blood sugar levels over the previous 2-3 months. A value of 6.5% or higher indicates diabetes. This test is useful for long-term monitoring.
• Random Blood Glucose Test: Taken at any time without fasting. A value of 200 mg/dL or higher with symptoms indicates diabetes.
• Clinical Examination: Physician measures weight, height, blood pressure, and examines eyes and feet for potential damage.
• Additional Tests: Liver and kidney function tests and lipid panels (cholesterol and triglycerides) may be ordered for comprehensive assessment.

Medications

• Alpha-Glucosidase Inhibitors: Slow sugar absorption from the intestines (e.g., acarbose, miglitol).
• Sulfonylureas: Stimulate the pancreas to produce more insulin (e.g., glibenclamide, gliclazide).
• Meglitinides: Work similarly to sulfonylureas but with faster onset and shorter duration (e.g., repaglinide).
• DPP-4 Inhibitors: Enhance hormones that lower blood sugar after meals (e.g., sitagliptin, linagliptin).
• SGLT2 Inhibitors: Modern drugs that remove excess sugar through urine (e.g., empagliflozin, canagliflozin), providing additional heart and kidney protection.
• GLP-1 Receptor Agonists: Modern medications that improve insulin secretion, reduce appetite, and aid weight loss (e.g., semaglutide, dulaglutide).
• Metformin: First-line and most widely used medication, reduces liver glucose production and improves insulin sensitivity.
• Insulin: May be recommended in advanced stages or when oral medications are insufficient.

Procedures / Surgery

• Bariatric Surgery: May be considered in severe obesity cases; promotes significant weight loss and substantially improves diabetes control.
• Continuous Glucose Monitoring (CGM): Devices that continuously track blood sugar levels, useful for patients on insulin therapy.

Lifestyle Changes

• Healthy Diet: Reduce sugars and saturated fats, increase fiber, vegetables, and whole grains. Follow a balanced diet like Mediterranean diet.
• Regular Exercise: 150 minutes of moderate physical activity weekly (e.g., brisk walking, swimming, light sports) plus resistance training twice weekly.
• Weight Management: Losing 5-10% of current weight significantly improves diabetes control.
• Stress Management: Relaxation techniques, yoga, and meditation help regulate blood sugar.
• Adequate Sleep: Getting 7-9 hours of quality sleep nightly is important for glucose metabolism.
• Smoking Cessation: Smoking increases complication risk.
• Limit Alcohol: Alcohol can affect blood sugar unpredictably.
• Self-Education: Learning about the disease and treatment commitment increases management success.

• Cardiovascular Disease: Diabetes significantly increases the risk of heart attacks, strokes, and cardiac events, which are leading causes of death in diabetic patients.
• Hypertension: Diabetes increases the likelihood of high blood pressure, placing additional strain on the heart and blood vessels.
• Kidney Disease (Nephropathy): Prolonged high blood sugar damages small blood vessels in the kidneys, potentially leading to kidney failure requiring dialysis.
• Eye Complications (Retinopathy): Diabetes can cause blindness or severe vision loss through damage to blood vessels in the retina.
• Neuropathy: Nerve damage causes pain, numbness, and weakness in the extremities, especially feet and legs; severe cases may result in amputation.
• Foot Problems and Chronic Wounds: Lack of sensation and poor circulation make feet susceptible to infections and ulcers that heal slowly.
• Excess Weight and Obesity: Diabetes and obesity affect each other, making weight management more difficult.
• Depression and Mental Health Issues: Living with a chronic disease may increase depression, anxiety, and psychological stress.

• Maintain a healthy weight: Aim for a BMI between 18.5-24.9 through healthy diet and regular exercise.
• Practice regular physical activity: Exercise at least 30 minutes daily, such as walking, swimming, or dancing.
• Follow a balanced healthy diet: Focus on vegetables, fruits, whole grains, and lean proteins; reduce sugars and saturated fats.
• Quit smoking: Smoking increases insulin resistance and complication risks.
• Limit alcohol consumption: If you drink, limit to one drink for women and two for men per day.
• Manage stress: Use relaxation techniques, yoga, or meditation to control stress.
• Get adequate sleep: Aim for 7-9 hours of quality sleep nightly.
• Regular medical check-ups: If you have risk factors, ask your doctor to screen for diabetes regularly.
• Control blood pressure and cholesterol: Maintaining normal readings reduces complication risks.
• Educate yourself about the disease: Learning about diabetes and risk factors helps you make healthy choices.