Diabetes Explained: Understanding the Disease, Its Complications and How to Live Well With It

Diabetes affects more than blood sugar. Learn about its types, complications, treatment options and the healthcare professionals who can help you live well with the condition.
Healthcare professional discussing blood sugar monitoring and diabetes management with a patient.
Written by
Melody Samaniego
Published on
November 5, 2026
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Diabetes is a lifelong condition, but its complications are not inevitable. With proper treatment, healthier habits and regular medical care, people with diabetes can protect their health and live full, active lives.

Diabetes is often described as having too much sugar in the blood. But there is more to the condition than that. It affects how the body uses energy, and when blood sugar remains elevated over time, it can damage vital organs, including the heart, kidneys, eyes and nerves.

The encouraging news is that diabetes can be managed. Understanding the disease, following an appropriate treatment plan and making informed lifestyle choices can significantly reduce the risk of complications.

Here’s what everyone should know.

What is diabetes?

Diabetes mellitus is a chronic condition in which the body either does not produce enough insulin or cannot use insulin effectively.

Insulin is a hormone produced by the pancreas. It helps glucose, or blood sugar, enter the body’s cells to be used as energy. When insulin is insufficient or ineffective, glucose accumulates in the bloodstream.

There are three common types:

  • Type 1 diabetes: An autoimmune condition in which the immune system attacks the insulin-producing cells of the pancreas. People with type 1 diabetes require lifelong insulin treatment.
  • Type 2 diabetes: The most common form. The body becomes resistant to insulin and may eventually produce insufficient amounts. Genetics, age, excess body weight and lifestyle factors can contribute.
  • Gestational diabetes: Develops during pregnancy and can increase the mother’s and child’s future risk of type 2 diabetes.

Diabetes can also develop without obvious symptoms. Some people discover they have it only during routine blood testing.

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What happens when diabetes is uncontrolled?

Persistently high blood glucose can damage blood vessels and nerves, affecting several parts of the body.

Common complications include:

  • Heart disease and stroke: Diabetes increases cardiovascular risk, particularly when accompanied by high blood pressure or abnormal cholesterol.
  • Kidney disease: Damaged kidney blood vessels can impair the body’s ability to filter waste.
  • Eye disease: Diabetic retinopathy can damage the blood vessels in the retina and lead to vision loss.
  • Nerve damage: Neuropathy may cause numbness, tingling, burning pain or loss of sensation, especially in the feet.
  • Foot complications: Poor circulation and reduced sensation can allow minor injuries to develop into ulcers and serious infections.
  • Oral health problems: People with diabetes have an increased risk of gum disease and other dental complications.

These complications do not develop in everyone, and many can be prevented, delayed or treated through consistent care.

How is diabetes treated?

There is no single treatment plan for everyone. Management depends on the type of diabetes, blood glucose levels, age, medical history and other health conditions.

Treatment may involve:

1. Medication

People with type 1 diabetes need insulin. For type 2 diabetes, treatment may include metformin, other oral medications, injectable medicines or insulin.

Some newer medications, including GLP-1 receptor agonists and SGLT2 inhibitors, can offer additional heart, kidney and weight-related benefits for appropriate patients.

Medication should always be prescribed and adjusted by a qualified healthcare professional. Patients should never stop or change treatment without medical advice.

2. Nutrition and dietary management

A balanced diet helps manage blood glucose, cholesterol and body weight.

A registered nutritionist-dietitian can help develop a realistic eating plan based on individual needs and food preferences.

Practical habits include:

  • Eat more vegetables, fruits, legumes and fiber-rich foods.
  • Choose appropriate portions of rice, bread and other carbohydrates.
  • Include lean protein, fish, eggs and healthy fats.
  • Limit sugary drinks, sweets and highly processed foods.
  • Be mindful of sodium and saturated fat.

Filipinos do not necessarily have to give up rice. Portion control, food combinations and consistency are more useful than unnecessarily restrictive diets.

3. Exercise and physical activity

Movement helps the body use insulin more effectively and improves cardiovascular health.

The general recommendation for most adults with diabetes is at least 150 minutes of moderate to vigorous aerobic activity weekly, spread over at least three days.

Walking, swimming, cycling and dancing are good options. Resistance exercises, such as light weight training, can also help maintain muscle strength.

Even short walks after meals and taking breaks from prolonged sitting can be beneficial. Those with existing complications should consult their healthcare team before starting a new exercise program.

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How can you prevent diabetes complications?

Managing diabetes means looking beyond blood sugar readings. Regular monitoring and preventive care are equally important.

Here are five essential habits:

  1. Monitor your blood sugar. Follow your doctor’s recommendations for glucose testing and periodic HbA1c measurements, which reflect average blood glucose over approximately two to three months.
  2. Have your eyes checked. Regular comprehensive eye examinations help detect diabetic retinopathy before vision problems develop.
  3. Protect your kidneys. Ask about annual urine albumin and kidney function tests, particularly if you have type 2 diabetes.
  4. Check your feet daily. Look for cuts, blisters, swelling, redness or changes in skin color. Seek medical attention for wounds that do not heal.
  5. Manage blood pressure and cholesterol. These are important cardiovascular risk factors. Take prescribed medications and attend regular checkups.

Never underestimate the importance of dental care, adequate sleep, smoking cessation and emotional well-being, too.

Who should be part of your diabetes care team?

Diabetes management works best when healthcare professionals work together.

Depending on your needs, your care team may include:

Healthcare professionalRole
EndocrinologistSpecializes in hormonal conditions and complex diabetes management
Primary care physicianCoordinates routine checkups and overall health
Registered nutritionist-dietitianDevelops personalized nutrition plans
Diabetes educatorTeaches glucose monitoring, medication use and self-management
OphthalmologistChecks for diabetes-related eye complications
NephrologistManages diabetes-related kidney disease
CardiologistAssesses and treats cardiovascular complications
Podiatrist or foot-care specialistHelps prevent and manage diabetic foot problems
PharmacistProvides guidance on medications and their proper use
Physical therapist or qualified fitness professionalHelps develop safe and appropriate exercise routines
Mental health professionalSupports emotional health and diabetes-related distress

Not everyone needs to see all these specialists. Your primary care physician or endocrinologist can coordinate referrals according to your health needs.

Can type 2 diabetes be prevented?

In many cases, yes. Although type 1 diabetes cannot currently be prevented, type 2 diabetes can often be delayed or prevented through lifestyle changes, particularly among people with prediabetes or increased risk.

Some practical steps include:

  • Maintain a healthy weight.
  • Aim for regular physical activity.
  • Eat a balanced, fiber-rich diet.
  • Reduce sugary beverages and highly processed foods.
  • Avoid smoking.
  • Have your blood sugar checked regularly if you have risk factors.

If you have prediabetes, early intervention can make a significant difference.

Living well with diabetes

A diabetes diagnosis can feel overwhelming, but it does not mean giving up the things that make life enjoyable.

It means learning to make informed choices, understanding your body’s needs and building habits that support long-term health.

There will be adjustments, and sometimes setbacks. What matters is consistency, access to appropriate medical care and a support system that encourages rather than judges.

Diabetes is a condition that requires lifelong attention, but it does not have to define a person’s life. With knowledge, proper treatment and the right support, living well with diabetes is possible.

Together for Better Health.

*Photo by Getty Images For Unsplash+

Editorial Note

Joyful Wellness provides general, science-informed health information to help readers make informed decisions about their well-being. Our content is intended for educational purposes and does not replace professional medical advice. For personal health concerns or symptoms, readers are encouraged to consult a licensed healthcare professional.


References

  1. World Health Organization. (2026). Diabetes. WHO
  2. American Diabetes Association. (2026). Standards of Care in Diabetes. ADA
  3. National Institute of Diabetes and Digestive and Kidney Diseases. Diabetes. NIDDK
  4. Philippine College of Endocrinology, Diabetes, and Metabolism. Clinical Practice Guidelines for the Management of Type 2 Diabetes Mellitus among Filipino Adults. Philippine DOH Guidelines Platform

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