What complications are associated with high blood sugar?

You are likely well aware that elevated blood glucose (hyperglycemia) is extremely common in daily life. Not only does hyperglycemia adversely affect our overall health, but it can also trigger numerous diseases. So, what complications can arise from high blood glucose?

What Are the Complications of Hyperglycemia?

Complications associated with hyperglycemia are broadly categorized as acute or chronic. Acute complications primarily include diabetic ketoacidosis (DKA) and hyperosmolar hyperglycemic state (HHS). Chronic complications further fall into macrovascular and microvascular categories. Macrovascular complications encompass coronary artery disease, cerebrovascular disease, and lower-limb arterial occlusive disease. Microvascular complications include diabetic nephropathy, diabetic retinopathy, and diabetic neuropathy. Diabetic foot results from the combined effects of vascular and neural damage in diabetes, often complicated by infection.

Chronic complications: Prolonged hyperglycemia—or related chronic metabolic disturbances—primarily affect the retina, kidneys, and peripheral nerves. Ocular manifestations include cataracts, glaucoma, retinal lesions, and, in severe cases, blindness due to advanced retinopathy. Renal involvement typically presents as proteinuria and progressive decline in renal function; some patients may ultimately develop uremia requiring dialysis. Neuropathic complications commonly manifest as numbness and pain.

Other complications: Individuals with hyperglycemia or diabetes face an increased risk of infections—including periodontal and urinary tract infections—as well as gastrointestinal disturbances such as alternating diarrhea and constipation. Delayed gastric motility may exacerbate constipation, and urinary retention may also occur. Additionally, cardiovascular and cerebrovascular events—including coronary artery disease, ischemic stroke, and lower-limb arterial disease—are more prevalent. We hope this information proves helpful to you!