High blood sugar (hyperglycemia) occurs when excess glucose builds up in the bloodstream, often linked to diabetes, and can lead to serious complications if untreated. Early warning signs include excessive thirst, frequent urination, increased hunger, fatigue, blurry vision, tingling in hands or feet, and skin changes like tags or bumps. These symptoms occur when the body can’t use insulin effectively, causing dehydration, nerve strain, and vision issues. Recognizing them early and seeking medical care for testing can prevent long-term damage, with management involving a healthy diet, regular exercise, stress control, and prescribed treatments.
