Type 2 diabetes is a chronic condition that occurs when the body loses its ability to effectively use glucose (blood sugar). Glucose is the primary energy source for cells. When this process is disrupted, blood sugar levels accumulate, leading to a range of symptoms and complications.
Type 2 diabetes is manageable if detected early. Many symptoms of the disease appear early but are often subtle, causing individuals to overlook them. Recognizing these warning signs can lead to timely treatment and long-term health protection.
Frequent urination
One of the earliest and most typical signs of diabetes is frequent urination, excessive urination, or both—medically known as polyuria. When blood sugar levels become too high, glucose "spills" into the urine. Normally, the kidneys reabsorb glucose, but when the amount of glucose exceeds the kidneys' processing capacity, the body is forced to excrete it through urine. This results in continuous urination, including nocturnal urination, which can disrupt sleep.
Slow wound healing
If you notice that cuts, scrapes, or bruises take a long time to heal, this could indicate high blood sugar. This condition is often linked to poor blood circulation, as prolonged high blood sugar narrows and stiffens blood vessels, making it difficult for oxygen and nutrients to reach the injured area for recovery. Additionally, excess sugar weakens the immune system, making white blood cells less effective. Consequently, the body struggles to fight off bacteria, increasing the risk of infection and prolonging wound healing time.
Blurred vision
Blurred vision is a symptom that often appears early when blood sugar levels are uncontrolled. A sudden increase in blood sugar alters osmotic pressure and affects the small blood vessels in the eyes, causing fluid to leak into the lens, changing its shape, and resulting in blurred vision.
This condition can improve once blood sugar is controlled, but if diabetes persists without proper treatment, more severe eye complications may arise. Individuals are at risk of developing cataracts or glaucoma, are prone to recurrent styes, and may experience ocular surface disorders. The most serious complication is diabetic retinopathy.
Intense hunger and thirst
Frequent urination causes dehydration, leading to a constant sensation of thirst to replenish lost fluids. In people with diabetes, even with increased water intake, thirst remains persistent because high blood sugar causes cellular-level dehydration, leading to fatigue and impacting daily activities.
Furthermore, an increased sense of hunger is a common sign. Due to insulin resistance, cells cannot absorb glucose for energy, leaving the body constantly "fuel-deficient" and continuously signaling hunger, even shortly after eating.
Dark skin patches
An easily recognizable external sign is the appearance of smooth, dark skin patches in folds such as the neck, armpits, or groin, known as acanthosis nigricans. In addition to discoloration, these skin areas may also thicken abnormally.
The main cause is insulin resistance, which leads to elevated insulin levels in the blood, stimulating excessive skin cell growth. This is considered a fairly typical early warning sign of type 2 diabetes.
Itchy skin
Itchy skin is sometimes one of the early signs of diabetes. This condition can stem from several causes, including fungal or yeast infections, dry skin due to dehydration from frequent urination, or poor blood circulation, especially in the lower legs, which prevents the skin from receiving adequate nourishment and makes it prone to itching.
Dry mouth
Dry mouth is a common oral health issue for people with diabetes, linked to reduced saliva production when blood sugar levels are high. Individuals often experience a continuously dry mouth, cracked lips, and a rough tongue, along with difficulty chewing, swallowing, or speaking. This condition also increases the risk of ulcers and infections in the oral cavity.
Bao Bao (Source: Healthline)
