Here’s a detailed guide to 14 symptoms that may indicate dangerously high blood sugar levels (hyperglycemia). These signs shouldn’t be ignored, as persistent high glucose can lead to serious health issues like diabetes complications.

⚠️ 14 Symptoms of Very High Blood Sugar

1. Excessive Thirst

Your body pulls water from tissues to dilute the high glucose, causing constant thirst.

2. Frequent Urination

High sugar levels force kidneys to filter excess glucose → more trips to the bathroom, especially at night.

3. Dry Mouth and Skin

Dehydration from high sugar leads to dry, cracked lips, parched mouth, and itchy skin.

4. Fatigue and Weakness

Cells can’t absorb glucose efficiently → body lacks energy → constant tiredness.

5. Blurred Vision

Fluid shifts in the eyes due to high sugar can temporarily blur vision.

6. Headaches

Dehydration and fluctuating blood sugar levels can trigger headaches.

7. Increased Hunger

Cells are starved for energy even though blood sugar is high → persistent hunger.

8. Unexplained Weight Loss

Body burns fat and muscle for energy because glucose isn’t being used properly.

9. Slow-Healing Wounds

High glucose damages blood vessels → poor circulation → cuts and bruises heal slowly.

10. Recurrent Infections

High blood sugar weakens immune response → more yeast infections, urinary tract infections, and skin infections.

11. Numbness or Tingling

Peripheral neuropathy develops when nerves are damaged by chronic high sugar → tingling or burning in hands and feet.

12. Irritability or Mood Swings

Glucose fluctuations can affect brain chemistry → anxiety, irritability, or depression.

13. Fruity-Smelling Breath

Extremely high blood sugar can lead to ketone buildup → breath may smell fruity (sign of diabetic ketoacidosis).

14. Nausea or Vomiting

Can occur if glucose levels are dangerously high, often accompanied by stomach discomfort or abdominal pain.

🧪 What To Do

Check your blood sugar immediately if you experience several of these symptoms.
Seek urgent medical attention if you notice fruity breath, vomiting, or confusion — signs of diabetic ketoacidosis, which is life-threatening.
Long-term management: diet, exercise, medication, and regular monitoring under a doctor’s guidance.

If you want, I can make a quick visual checklist of these 14 symptoms with what each one indicates and what to do immediately, so you can spot high blood sugar fast.

Do you want me to make that checklist?

14 Symptoms That Indicate You Have Very High Blood Sugar Levels