Complications of untreated diabetes
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Chronic Complications of Untreated Diabetes: Key Risks
Untreated diabetes leads to persistently high blood sugar, which causes damage to many organs and systems in the body. The most common and serious complications are divided into two main categories: microvascular (small blood vessel) and macrovascular (large blood vessel) complications Lotfy2016Tikkanen2021Deshpande2008+6 MORE.
Microvascular Complications: Retinopathy, Nephropathy, and Neuropathy
Diabetic Retinopathy and Vision Loss
High blood sugar damages the small blood vessels in the eyes, leading to diabetic retinopathy. If untreated, this can cause vision impairment and even blindness Lotfy2016Deshpande2008Valencia2017+3 MORE.
Diabetic Nephropathy and Kidney Failure
The kidneys are also affected, with untreated diabetes leading to diabetic nephropathy. This can progress to chronic kidney disease and, eventually, kidney failure requiring dialysis or transplantation Lotfy2016Deshpande2008An2021+4 MORE.
Diabetic Neuropathy and Nerve Damage
Nerve damage, or diabetic neuropathy, is another common complication. It can cause pain, numbness, and weakness, especially in the feet and hands. This increases the risk of injuries and infections Lotfy2016Deshpande2008An2021+4 MORE.
Macrovascular Complications: Heart, Brain, and Peripheral Arteries
Cardiovascular Disease
Untreated diabetes significantly raises the risk of heart disease, including coronary artery disease, heart attacks, and strokes. These are leading causes of death among people with diabetes Tikkanen2021Deshpande2008An2021+2 MORE.
Peripheral Artery Disease and Amputation
Damage to large blood vessels in the limbs can cause peripheral artery disease, leading to poor circulation, pain, and a higher risk of infections and ulcers. In severe cases, this can result in lower-extremity amputations Tikkanen2021Deshpande2008An2021+4 MORE.
Other Serious Complications
Diabetic Foot Disease
Untreated diabetes can cause foot ulcers and infections due to poor blood flow and nerve damage. These foot problems often go undiagnosed and can lead to amputation if not managed early Cwajda-Białasik2024Horinouchi2022.
Increased Risk of Death
All these complications—especially when combined—lead to a higher risk of early death in people with untreated diabetes Lotfy2016Deshpande2008An2021+3 MORE.
Factors That Worsen Complications
The risk and severity of complications are higher in people with longer duration of diabetes, poor blood sugar control, older age, high blood pressure, high cholesterol, smoking, and poor nutrition An2021Alam20219+1 MORE. Poor nutritional status at the time of diagnosis is linked to a higher risk of retinopathy, nephropathy, and diabetic foot problems .
Conclusion
Untreated diabetes can cause serious and life-threatening complications affecting the eyes, kidneys, nerves, heart, blood vessels, and feet. Early diagnosis, regular screening, and proper management are essential to prevent or delay these complications and improve quality of life.
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