Without insulin, that extra sugar starts to hang out in your blood with nowhere to go. Just like with honey or sweet syrup, high concentrations of sugar causes the blood to thicken. Physiologically, this pulls fluids and water from other parts of the body into the bloodstream, causing swelling and dryness. Early symptoms of diabetes are relatively mild, including excessive peeing, dry mouth, itchy skin, hunger, fatigue, and blurred vision.
Several other signs and symptoms can mark the onset of diabetes although they are not specific to the disease. In addition to the known ones above, they include blurred vision, headache, fatigue, slow healing of cuts, and itchy skin. Prolonged high blood glucose can cause glucose absorption in the lens of the eye, which leads to changes in its shape, resulting in vision changes. Long-term vision loss can also be caused by diabetic retinopathy. A number of skin rashes that can occur in diabetes are collectively known as diabetic dermadromes.
Abnormal cholesterol and triglyceride levels. If you have low levels of high-density lipoprotein (HDL), or "good," cholesterol, your risk of type 2 diabetes is higher. Triglycerides are another type of fat carried in the blood. People with high levels of triglycerides have an increased risk of type 2 diabetes. Your doctor can let you know what your cholesterol and triglyceride levels are.