Signs Your Blood Sugar is Too High

Your blood sugar—or glucose—levels play a big role in how you feel. When your glucose levels are balanced, you have steady energy to power through your day. But when glucose levels go too high or too low, your body sends signs that it needs attention. 

A glucometer, continuous glucose monitor (CGM), or a lab test can measure how many milligrams of sugar are in a deciliter of blood (mg/dL). Learn the signs of blood sugar that’s out of balance and ways to prevent spikes and drops. 

Is your glucose too high?

(>25 mg/dL when fasting, >180 mg/dL two hours after a meal) 

Your blood sugar might spike a little after meals. But when it stays high, it can cause different problems, like:

• Frequent urination: Your body works hard to flush out extra sugar.
• Excessive thirst: Losing water leads to dehydration.
• Fatigue: High sugar can interfere with your energy level.
• Blurred vision: Extra glucose can strain your eyes.
• Slow-healing wounds: High glucose affects how you fight infections and heal.
• Dry mouth and itchy skin: Dehydration can leave your skin feeling irritated.

Is your glucose too low? 

(<70 mg/dL) 

When glucose drops too low, your body struggles to function. Signs of low sugar include:

• Shakiness and sweating: A stress response kicks in when your body runs low on fuel.
• Rapid heartbeat: Your body releases adrenaline to fight the shortage.
• Hunger or nausea: Strong signals tell you to eat right away.
• Dizziness or confusion: Your brain needs glucose to think clearly.
• Blurred vision: Just like with high sugar, your eyes can be impacted.
• Irritability: Low sugar can affect your mood.
• Tired or fatigued: Your cells may not get enough fuel, causing you to feel sluggish.

Keep it steady.

Balancing blood sugar doesn’t have to be complicated. Small changes can make a big difference, like:

• Keep meals consistent: Eat regularly and avoid skipping meals.
• Choose balanced meals: Combine carbs with fiber, protein, and healthy fats to slow sugar spikes.
• Stay active: Movement helps your body use glucose better.
• Monitor your levels: Use tools like glucometers to check regularly.
• Plan ahead: Keep snacks, drinks, and rescue meds handy in case your blood sugar drops.
• Work with a health care provider: Stay in touch with your doctor or MOBE Pharmacist to adjust medications if needed.

By paying attention to your glucose levels and making small, steady changes, you can feel better, stay energized, and support your long-term health. Looking for guidance? MOBE Pharmacists are here to help you take the next step.

References:

American Diabetes Association Professional Practice Committee; 2. Diagnosis and Classification of Diabetes: Standards of Care in Diabetes—2025. Diabetes Care 1 January 2025; 48 (Supplement 1): S27–S49. https://doi.org/10.2337/dc25-S002

American Diabetes Association Professional Practice Committee; 6. Glycemic Goals and Hypoglycemia: Standards of Care in Diabetes—2025. Diabetes Care 1 January 2025; 48 (Supplement 1): S128–S145. https://doi.org/10.2337/dc25-S006