A definitive sign or symptom of hyperglycemia is

Hyperglycemia, or high blood sugar, can present with several signs and symptoms. A definitive sign of hyperglycemia includes:

• Frequent urination (polyuria): Excess glucose in the blood leads to increased urination as the body tries to remove the excess sugar.
• Increased thirst (polydipsia): Frequent urination can lead to dehydration, causing excessive thirst.
• Fatigue: High blood sugar levels can prevent cells from getting the energy they need, leading to tiredness.
• Blurred vision: High glucose levels can cause swelling in the lenses of the eyes, affecting vision.

If you experience these symptoms, it's important to check your blood sugar levels and consult a healthcare professional for further evaluation.