High blood sugar, also known as hyperglycemia, can cause a variety of symptoms, including:

1. Increased thirst: High blood sugar levels can cause you to feel thirsty and drink more fluids.
2. Frequent urination: Your body may try to remove excess glucose from your bloodstream by urinating more frequently.
3. Dry mouth: High blood sugar levels can cause you to experience a dry mouth, leading to a feeling of thirst.
4. Hunger: High blood sugar levels can make you feel hungry, even if you have recently eaten.
5. Fatigue: High blood sugar levels can cause you to feel tired or fatigued, as your body is not using glucose effectively.
6. Blurred vision: High blood sugar levels can cause changes in your eye’s ability to focus, leading to blurred vision.
7. Slow-healing cuts or wounds: High blood sugar levels can interfere with the body’s ability to heal wounds, leading to slow healing or an increased risk of infection.

If you are experiencing any of these symptoms and suspect that your blood sugar may be too high, it is important to speak with a healthcare provider for proper diagnosis and treatment.