8 Signs Your Blood Sugar May Be Too High — and What to Do
“Too much sugar in your body” isn’t a precise medical diagnosis. What matters medically is elevated blood glucose (hyperglycemia), which can occur with diabetes, certain medications, illness, or other conditions.
These symptoms can be clues, but you can’t diagnose high blood sugar from symptoms alone.
1. Frequent Urination
When blood glucose becomes high enough, the kidneys excrete more glucose into urine, pulling additional water with it. This can make you urinate more frequently, including at night.
2. Increased Thirst
The resulting fluid loss can cause pronounced thirst.
3. Increased Hunger
Some people with diabetes experience increased hunger even after eating because glucose isn’t being used normally by the body’s cells.
4. Unexplained Weight Loss
Significant or unintentional weight loss can occur when the body cannot effectively use glucose and begins using fat and muscle for energy.
5. Fatigue
High or poorly controlled blood glucose can be associated with tiredness and reduced energy.
6. Blurred Vision
High glucose can temporarily change the fluid balance in the eye and affect vision. Persistent or recurring blurred vision should be evaluated.
7. Slow-Healing Cuts or Frequent Infections
Diabetes can impair immune function and circulation, increasing susceptibility to some infections and making wounds harder to heal.
8. Tingling or Numbness
Persistently high blood glucose can damage nerves over time, potentially causing tingling, burning, pain, or numbness, especially in the feet.
What Should You Do?
If you’re experiencing several of these symptoms, don’t simply cut out sweets and assume the problem is solved. Get your blood glucose checked.
Common tests include:
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A1C (HbA1c) — reflects average blood glucose over roughly the previous 2–3 months.
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Fasting blood glucose
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A random blood-glucose test when appropriate
If you already have diabetes, follow the glucose-monitoring and medication plan provided by your healthcare team.
Reduce Added Sugar—But Don’t Fear All and highly processed desserts. At the same time, nutritious carbohydrate-containing foods such as vegetables, Carbohydrates
A healthy approach is to limit foods and drinks high in added sugars, particularly sugary beverages, sweets, and highly processed desserts. At the same time, nutritious carbohydrate-containing foods such as vegetables, whole fruits, beans, and whole grains can be part of a healthy diet.
Seek Urgent Medical Care If…
Very high blood glucose can become dangerous. Vomiting, abdominal pain, deep or rapid breathing, severe dehydration, confusion, or unusual drowsiness can be warning signs of a serious metabolic emergency.
Bottom Line
Frequent urination, excessive thirst, unexplained weight loss, fatigue, and blurred vision can occur with high blood sugar, but they aren’t specific to diabetes.
A blood test—not symptoms alone—is the reliable way to determine whether your blood sugar is elevated.
