Diabetes: Introduction,Types,Sign and Symptoms, Lab Diagnosis, Treatment, and Keynotes


Diabetes mellitus (DM), commonly referred to as diabetes, is a chronic metabolic disorder characterized by high blood sugar levels over a prolonged period. It occurs when the body either does not produce enough insulin or fails to use insulin effectively.

Collecting blood sample for Diabetes screening
Fig. Collecting blood sample for Diabetes screening

Insulin is a hormone produced by the pancreas that plays a crucial role in regulating blood sugar levels. It allows glucose, which is derived from the food we consume, to enter cells and be used as a source of energy. In diabetes, the inability to properly utilize or produce insulin leads to an accumulation of glucose in the bloodstream, resulting in hyperglycemia.


There are several types of diabetes, including:

  1. Type 1 diabetes: This type occurs when the immune system mistakenly attacks and destroys the insulin-producing cells in the pancreas. It usually develops in childhood or adolescence, and individuals with type 1 DM require lifelong insulin therapy.
  2. Type 2 diabetes: This is the most common form of diabetes, accounting for the majority of cases. It occurs when the body becomes resistant to the effects of insulin or fails to produce enough insulin to maintain normal blood sugar levels. Type 2 diabetes is often associated with lifestyle factors such as obesity, physical inactivity, and poor diet. It can be managed through lifestyle modifications, oral medications, and, in some cases, insulin therapy.
  3. Gestational diabetes: This type occurs during pregnancy when hormonal changes affect insulin action. It usually resolves after childbirth, but women with gestational diabetes have an increased risk of developing type 2 diabetes later in life.

Sign and Symptoms

The signs and symptoms of diabetes can vary depending on the type and progression of the disease. However, some common signs and symptoms include:

  1. Increased thirst and frequent urination: Excess sugar in the bloodstream can cause the kidneys to work harder to filter and absorb the glucose, leading to increased urine production. This can result in increased thirst and more frequent trips to the bathroom.
  2. Unexplained weight loss: Individuals with DM may experience weight loss despite eating more due to the body’s inability to properly utilize glucose for energy. This occurs especially in type 1 diabetes.
  3. Fatigue: Feelings of fatigue and low energy levels are common in this disease. Insufficient insulin or the body’s inability to use insulin effectively can lead to difficulties in converting glucose into energy.
  4. Increased hunger: Despite eating adequately, people with DM may experience increased hunger. This can be a result of the body’s inability to utilize glucose properly, leading to a sense of constant hunger.
  5. Blurred vision: High blood sugar levels can cause fluid to be pulled from the lenses of the eyes, resulting in blurred vision. This symptom usually resolves once blood sugar levels are under control.
  6. Slow-healing wounds: It can affect the body’s ability to heal wounds and infections. Even minor cuts or sores may take longer to heal, increasing the risk of complications.
  7. Numbness or tingling in the extremities: It can cause nerve damage (neuropathy), resulting in sensations of numbness, tingling, or pain in the hands and feet.
  8. Recurring infections: High blood sugar levels can weaken the immune system, making individuals with diabetes more prone to frequent infections, such as urinary tract infections, skin infections, or gum disease.
  9. Dry, itchy skin: It can cause dryness and itchiness of the skin, especially in the lower legs.
  10. Dark patches of skin: Some people with diabetes may develop patches of darkened skin, usually in areas of the body with creases or folds, such as the neck, armpits, and groin. This condition is known as acanthosis nigricans.

Laboratory Diagnosis

Laboratory diagnosis of diabetes involves various tests that help determine an individual’s blood glucose levels and assess their overall glycemic control. The following are commonly used laboratory tests for diagnosing and monitoring this disease:

  • Fasting Plasma Glucose (FPG): This test measures blood glucose levels after an overnight fast of at least 8 hours. A diagnosis of diabetes is typically made if the FPG level is equal to or higher than 126 mg/dL (7.0 mmol/L) on two separate occasions.
  • Oral Glucose Tolerance Test (OGTT): The OGTT involves measuring blood glucose levels before and 2 hours after consuming a glucose-rich drink. A diagnosis of diabetes is made if the 2-hour plasma glucose level is equal to or higher than 200 mg/dL (11.1 mmol/L) on two separate occasions.
  • Hemoglobin A1c (HbA1c): This test reflects the average blood glucose levels over the past 2-3 months. It measures the percentage of hemoglobin that is glycated (bound to glucose). A diagnosis of diabetes is typically made if the HbA1c level is equal to or higher than 6.5% (48 mmol/mol) on two separate occasions.
Hemoglobin A1c (HbA1c) test using Nycocard Reader
Fig. Hemoglobin A1c (HbA1c) test using Nycocard Reader
  • Random Plasma Glucose: This test measures blood glucose levels at any time of the day, regardless of the last meal. A diagnosis of this disease is considered if the random plasma glucose level is equal to or higher than 200 mg/dL (11.1 mmol/L) and is accompanied by symptoms of hyperglycemia.

In addition to these diagnostic tests, other laboratory assessments may be performed to evaluate the overall health status and complications associated with diabetes:

  • Urine Tests: Urine samples may be collected to measure glucose and ketone levels. Presence of glucose in the urine (glycosuria) may indicate high blood glucose levels. Ketones in the urine may be a sign of diabetic ketoacidosis, a serious complication of diabetes.
  • Lipid Profile: This test measures the levels of total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides in the blood. It helps assess cardiovascular risk, as individuals with diabetes are more prone to heart disease.
  • Kidney Function Tests: Blood tests such as serum creatinine and urine tests like microalbuminuria can evaluate kidney function and detect early signs of diabetic nephropathy (kidney disease).
  • Liver Function Tests: These tests assess liver health and function, as individuals with diabetes may be at an increased risk of non-alcoholic fatty liver disease.


The treatment of diabetes aims to manage blood glucose levels, prevent complications, and improve overall health and quality of life. The treatment approach may vary depending on the type, individual needs, and other factors. Here are some common treatment strategies are as follows:

  1. Lifestyle Modifications:
    • Healthy Diet: Following a balanced diet that includes a variety of fruits, vegetables, whole grains, lean proteins, and healthy fats. Limiting the intake of sugary foods and beverages, refined carbohydrates, and saturated fats is important.
    • Regular Physical Activity: Engaging in regular exercise or physical activity helps improve insulin sensitivity, control weight, and manage blood glucose levels. It is recommended to aim for at least 150 minutes of moderate-intensity aerobic activity per week, along with strength training exercises.
  2. Medications:
    • Insulin Therapy: People with type 1 DM and some individuals with type 2 diabetes may require insulin therapy to manage their blood glucose levels. Insulin can be administered through injections or insulin pumps.
    • Oral Medications: For individuals with type 2 diabetes, various oral medications are available to help lower blood glucose levels. These medications work by increasing insulin production, improving insulin sensitivity, or reducing glucose production in the liver.
  3. Blood Glucose Monitoring:
    • Regular self-monitoring of blood glucose levels using a glucometer helps individuals with diabetes understand their glycemic control and make necessary adjustments in their treatment plan.
    • Continuous Glucose Monitoring (CGM): CGM systems provide real-time glucose readings throughout the day, helping individuals track their blood glucose levels more closely.
  4. Education and Self-Management:
    • Diabetes Education: Learning about DM, its management, and lifestyle modifications is essential. DM education programs provide information on meal planning, medication management, physical activity, blood glucose monitoring, and prevention of complications.
    • Self-Care Practices: Adopting self-care practices such as regular foot care, proper hygiene, managing stress, and adhering to medication regimens are important aspects of DM management.
  5. Regular Medical Care:
    • Regular check-ups with healthcare professionals, including primary care physicians, endocrinologists, and diabetes educators, are crucial to monitor blood glucose levels, adjust treatment plans, and screen for complications.
    • Screening for Complications: Regular screenings for complications associated with diabetes, such as eye exams, kidney function tests, lipid profiles, and foot exams, help identify and manage any potential issues early on.
Sucking Blood in Glucometer for Blood Sugar Monitoring
Fig. Sucking Blood in Glucometer for Blood Sugar Monitoring


  • Diabetes is a chronic metabolic disorder characterized by high blood glucose levels due to the body’s inability to produce or effectively use insulin.
  • There are different types of diabetes, including type 1, type 2, and gestational DM .
  • Type 1 DM is an autoimmune disease where the immune system attacks and destroys insulin-producing cells in the pancreas, resulting in a lack of insulin production.
  • Type 2 DM is the most common form and occurs when the body becomes resistant to insulin or doesn’t produce enough insulin to maintain normal blood glucose levels.
  • Gestational diabetes occurs during pregnancy and usually resolves after childbirth, but it increases the risk of type 2 DM later in life.
  • Symptoms of DM can include increased thirst, frequent urination, unexplained weight loss, fatigue, increased hunger, blurred vision, slow-healing wounds, numbness or tingling in the extremities, recurring infections, dry skin, and dark patches of skin.
  • Diagnosis of diabetes is typically made through blood tests such as fasting plasma glucose (FPG), oral glucose tolerance test (OGTT), and hemoglobin A1c (HbA1c).
  • Treatment of DM involves a combination of lifestyle modifications, such as a healthy diet and regular exercise, and medications (including insulin or oral medications) to manage blood glucose levels.
  • Regular monitoring of blood glucose levels, along with routine check-ups and screenings for complications, is crucial in DM management.
  • Diabetes self-management education and support programs provide knowledge and skills to individuals with DM for effective self-care and management of the condition.
  • Diabetes is a chronic condition that requires lifelong management, but with proper treatment and lifestyle adjustments, individuals with DM can lead healthy lives and minimize the risk of complications.
Reading Blood Sugar in Glucometer
Fig. Reading Blood Sugar in Glucometer

Further Readings

  1. American Diabetes Association (ADA): The ADA is a leading organization in diabetes research, education, and advocacy. Their website provides comprehensive information on all aspects of diabetes, including diagnosis, treatment, lifestyle management, and prevention. Visit their website at www.diabetes.org.
  2. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK): NIDDK is part of the U.S. National Institutes of Health (NIH) and offers a wealth of resources on diabetes research, clinical trials, and patient education. Their website provides in-depth information on diabetes, its complications, and current scientific advancements. Visit their website at www.niddk.nih.gov.
  3. Mayo Clinic: The Mayo Clinic is a reputable medical institution that provides reliable and up-to-date information on various health topics, including diabetes. Their website offers comprehensive articles, patient guides, and resources on diabetes management and care. Visit their website at www.mayoclinic.org/diseases-conditions/diabetes.
  4. Centers for Disease Control and Prevention (CDC): The CDC is a trusted source for public health information. Their website contains resources and educational materials on diabetes prevention, risk factors, and lifestyle interventions. Visit their website at www.cdc.gov/diabetes/home.
  5. Diabetes Forecast: Published by the ADA, Diabetes Forecast is a magazine dedicated to providing practical information, tips, and stories related to diabetes management and living well with the condition. You can access articles and subscribe to the magazine at www.diabetesforecast.org.

3 thoughts on “Diabetes: Introduction,Types,Sign and Symptoms, Lab Diagnosis, Treatment, and Keynotes”

  1. After study a few of the weblog posts on your web site now, and I really like your method of blogging. I bookmarked it to my bookmark web site checklist and will be checking again soon. Pls check out my website as well and let me know what you think.

  2. One thing is that one of the most widespread incentives for applying your credit card is a cash-back or perhaps rebate provision. Generally, you will get 1-5 back upon various expenditures. Depending on the credit card, you may get 1 back again on most buying, and 5 back again on purchases made on convenience stores, gas stations, grocery stores in addition to ‘member merchants’.


Leave a Comment