Frequent urination: Increased need to urinate, especially at night. Excessive thirst: Persistent, intense thirst despite drinking fluids. Increased hunger: Constant feeling of hunger even after eating. Fatigue: Persistent tiredness and lack of energy. Blurred vision: Difficulty seeing clearly or sudden vision changes. Unexplained weight loss: Losing weight without trying, especially in Type 1 diabetes. Slow-healing sores: Cuts or wounds that take longer to heal. Frequent infections: Recurring infections, such as yeast infections or urinary tract infections. Numbness or tingling: Sensations in hands or feet, particularly in Type 2 diabetes.