13 Warning Signs of High Blood Sugar and 9 Ways to Take Control of Your Health

High blood sugar—also known as hyperglycemia—is a silent warning sign that can point to Type 2 diabetes, a chronic condition that affects millions of people worldwide. Alarmingly, 1 in 3 individuals with diabetes are unaware they have it, often missing the subtle symptoms until complications arise.

Left unmanaged, high blood sugar can lead to serious health issues like heart disease, nerve damage, and vision loss. The good news? With early detection and lifestyle changes, you can take control of your health and significantly lower your risk.

13 Warning Signs of High Blood Sugar (Type 2 Diabetes)

Type 2 diabetes occurs when your body either doesn’t produce enough insulin or can’t effectively use it. As a result, sugar builds up in your bloodstream. Here are the most common early symptoms you shouldn’t ignore:

1. Frequent Urination (Polyuria)

If you’re visiting the bathroom more often, especially at night, your kidneys may be working overtime to flush out excess sugar.

2. Constant Thirst (Polydipsia)

More urination means more fluid loss, leading to excessive thirst. This cycle can continue unless blood sugar levels are stabilized.

3. Increased Hunger (Polyphagia)

Despite eating, your body might not be getting the energy it needs due to poor glucose absorption, leading to cravings and frequent hunger.

4. Dry Mouth and Gum Issues

Lack of saliva can make your mouth feel dry, promote bacterial growth, and increase the risk of oral infections or gum disease.

5. Unexplained Weight Loss or Gain

Rapid weight loss could mean your body is breaking down muscle for energy. On the flip side, overeating sugary foods can lead to weight gain.

6. Fatigue and Irritability

Low cellular glucose leads to low energy. Poor sleep from nighttime urination only worsens fatigue, potentially impacting your mood.

7. Blurred Vision

High blood sugar can alter fluid levels in your eyes, affecting the lenses and causing temporary or even permanent vision changes.

8. Headaches

Persistent or unexplained headaches may be an early indicator of fluctuating or elevated blood sugar levels.

9. Slow-Healing Cuts and Bruises

High glucose can impair circulation and immune response, slowing the body’s ability to heal wounds or fight off infection.

10. Frequent Yeast or Fungal Infections

Excess sugar fuels bacteria and fungi, increasing susceptibility—particularly to vaginal infections in women.

11. Tingling or Numbness in Hands and Feet

Nerve damage (diabetic neuropathy) can develop early. This symptom often begins with tingling or burning sensations.

12. Skin Changes

Dark, velvety patches on the neck, armpits, or groin (acanthosis nigricans) can signal insulin resistance. Other skin irritations may follow.

13. Sexual Health Changes

High blood sugar can impair blood flow and nerve function, leading to erectile dysfunction in men and vaginal dryness in women.

If you recognize any of these signs, consult your doctor. A simple blood test can determine whether you have diabetes or are at risk.